Tag: CypherPunk

CypherPunk Movement

THE CYPHERPUNK MOVEMENT

Let’s make a journey back in time to see where blockchain technology and cryptocurrencies came from. It will take us back to the CypherPunk Movement starting in the 1970’s.

Cryptography for the People

Encryption was primarily used for military purposes before the 1970s. People at that time were living in an analog world. Few had computers and even fewer could imagine a technology that would connect almost every human being on the planet – the internet.

Two publications brought cryptography into the open, namely the “Data Encryption Standard” published by the US Government, and a paper called “New Directions in Cryptography” by Dr. Whitfield Diffie and Dr. Martin Hellman, published in 1976.

Dr. David Chaum started writing on topics such as anonymous digital cash and pseudonymous reputation systems in the 1980s, such as the ones described in “Security without Identification: Transaction Systems to make Big Brother Obsolete”. This was the first step toward the digital currencies we see today.

The Cypherpunks

We walk on shoulders of Giants!
Hughes, May, Back, Finney, Gilmore, Szabo

It wasn’t until 1992 that a group of cryptographers in the San Francisco Bay area started meeting up on a regular basis to discuss their work and related ideas. They built a basis for years of cryptographic research to come.

Besides their regular meetings, they also started the Cypherpunk mailing list in which they discussed many ideas including those which led to the birth of Bitcoin.

In late 1992 Eric Hughes, one of the first cypherpunks, wrote “A Cypherpunk’s Manifesto” laying out the ideals and vision of the movement.

Note: We encourage you to read A Cypherpunk’s Manifesto. The Manifesto is just as relevant today as it was in 1992. This short read takes only a few minutes of your time. It’s astonishing to see how much foresight the early members had when most people didn’t even think about computers yet.

A Cypherpunks’s Manifesto

An excerpt from the Manifesto:

“Privacy is necessary for an open society in the electronic age.

Privacy is not secrecy.

A private matter is something one doesn’t want the whole world to know, but a secret matter is something one doesn’t want anybody to know.

Privacy is the power to selectively reveal oneself to the world.”

“Privacy in an open society also requires cryptography.

If I say something, I want it heard only by those for whom I intend it.

If the content of my speech is available to the world, I have no privacy.

To encrypt is to indicate the desire for privacy, and to encrypt with weak cryptography is to indicate not too much desire for privacy.”

“We must defend our own privacy if we expect to have any.

We must come together and create systems which allow anonymous transactions to take place.

People have been defending their own privacy for centuries with whispers, darkness, envelopes, closed doors, secret handshakes, and couriers.

The technologies of the past did not allow for strong privacy, but electronic technologies do.”

“We the Cypherpunks are dedicated to building anonymous systems.

We are defending our privacy with cryptography, with anonymous mail forwarding systems, with digital signatures, and with electronic money.”

Electronic Cash

Although you might have just heard about this movement for the first time, you have most definitely benefitted from the efforts of some of their members in building Tor, BitTorrent, SSL, and PGP encryption. It should not surprise you that many concepts and ideas that originated from this group led to the emergence of cryptocurrencies.

In 1997, Dr. Adam Back created HashCash, which he proposed as a measure against spam. A little later, in 1998, Wei Dai published his idea for b-money and conceived the ideas of Proof-of-Work and Proof-of-Stake to achieve consensus across a distributed network. In 2005 Nick Szabo published a proposal for Bit Gold. There was no cap on the maximum supply but he introduced the idea to value each unit of Bit Gold by the amount of computational work that went into producing it. Although this is not how cryptocurrencies are valued, the price of production (comprised of hardware and electricity cost) plays a role in the pricing of these digital assets.

In 2008, Satoshi Nakamoto released the Bitcoin white paper, citing and building upon HashCash and b-money. Citations from his early communications and parts of his white paper, such as the following on privacy, suggest Nakamoto was close to the cypherpunk movement.

“The traditional banking model achieves a level of privacy by limiting access to information to the parties involved and the trusted third party. The necessity to announce all transactions publicly precludes this method, but privacy can still be maintained by breaking the flow of information in another place: by keeping public keys anonymous. The public can see that someone is sending an amount to someone else, but without information linking the transaction to anyone. This is similar to the level of information released by stock exchanges, where the time and size of individual trades, the ‘tape’, is made public, but without telling who the parties were.”

Technology did not enable strong privacy prior to the 20th century, but neither did it enable affordable mass surveillance. We believe in the human right to privacy and work towards enabling anyone who wishes to claim his or her privacy to do so. We see a cryptocurrency with selective privacy as a good step in the right direction of reclaiming our privacy.

Block 170 – First ever bitcoin transaction

2009-01-12 04:30
#1 bitcoin transaction

The first ever bitcoin transaction from one person to another, on 2009-01-12 at 04:30 used Pay-to-Public-Key (P2PK), when Satoshi Nakamoto sent coins to Hal Finney in Block 170.

P2PK is no longer used because it is a more expensive, less private, and less secure way of receiving bitcoin than other methods.

Pay-to-Public-Key (P2PK)
Quick facts
• Transaction:
 f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16

Timestamp: ‎

2009-01-12 04:30 (14 years ago)

Fee:	0 sat / $0.00

Fee rate: 0.00 sat/vB

• Details

Size	: 275 B

Virtual size: ‎275 vB

Weight: ‎1.1 kWU

Version	: 1

Locktime	: 0

Transaction hex:

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

• Inputs & Outputs

P2PK:	‎50.00000000 BTC

ScriptSig (ASM):

OP_PUSHBYTES_71 304402204e45e16932b8af514961a1d3a1a25fdf3f4f7732e9d624c6c61548ab5fb8cd410220181522ec8eca07de4860a4acdd12909d831cc56cbbac4622082221a8768d1d0901

ScriptSig (HEX):
	47304402204e45e16932b8af514961a1d3a1a25fdf3f4f7732e9d624c6c61548ab5fb8cd410220181522ec8eca07de4860a4acdd12909d831cc56cbbac4622082221a8768d1d0901

nSequence:	 0xffffffff

Previous output script:

OP_PUSHBYTES_65 0411db93e1dcdb8a016b49840f8c53bc1eb68a382e97b1482ecad7b148a6909a5cb2e0eaddfb84ccf9744464f82e160bfa9b8b64f9d4c03f999b8643f656b412a3
OP_CHECKSIG

Previous output type:	P2PK

P2PK: ‎10.00000000 BTC	

ScriptPubKey(ASM):

OP_PUSHBYTES_65 04ae1a62fe09c5f51b13905f07f06b99a2f7159b2225f374cd378d71302fa28414e7aab37397f554a7df5f142c21c1b7303b8a0626f1baded5c72a704f7e6cd84c
OP_CHECKSIG

ScriptPubKey (HEX):	

4104ae1a62fe09c5f51b13905f07f06b99a2f7159b2225f374cd378d71302fa28414e7aab37397f554a7df5f142c21c1b7303b8a0626f1baded5c72a704f7e6cd84cac

Type: P2PK

P2PK: ‎40.00000000 BTC

ScriptPubKey (ASM):

OP_PUSHBYTES_65 0411db93e1dcdb8a016b49840f8c53bc1eb68a382e97b1482ecad7b148a6909a5cb2e0eaddfb84ccf9744464f82e160bfa9b8b64f9d4c03f999b8643f656b412a3
OP_CHECKSIG

ScriptPubKey (HEX):
	410411db93e1dcdb8a016b49840f8c53bc1eb68a382e97b1482ecad7b148a6909a5cb2e0eaddfb84ccf9744464f82e160bfa9b8b64f9d4c03f999b8643f656b412a3ac

Type	: P2PK

50.00000000 BTC

• Details

Size: ‎275 B

Virtual size: ‎275 vB

Weight	: 1.1 kWU

Version: ‎1

Locktime: 0

Transaction hex:

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

Source: https://mempool.space/

Happy New Year 2023

Only One Wish for 2023

Controlled Supply

Bitcoin

“A fixed money supply, or a supply altered only in accord with objective and calculable criteria, is a necessary condition to a meaningful just price of money.”

Fr. Bernard W. Dempsey, S.J. (1903-1960)

In a centralized economy, currency is issued by a central bank at a rate that is supposed to match the growth of the amount of goods that are exchanged so that these goods can be traded with stable prices. The monetary base is controlled by a central bank. In the United States, the Fed increases the monetary base by issuing currency, increasing the amount banks have on reserve or by a process called Quantitative Easing.

In a fully decentralized monetary system, there is no central authority that regulates the monetary base. Instead, currency is created by the nodes of a peer-to-peer network.

The Bitcoin generation algorithm defines, in advance, how currency will be created and at what rate. Any currency that is generated by a malicious user that does not follow the rules will be rejected by the network and thus is worthless.

Currency with Finite Supply

Block reward halving
Controlled supply

Bitcoins are created each time a user discovers a new block. The rate of block creation is adjusted every 2016 blocks to aim for a constant two week adjustment period (equivalent to 6 per hour.)

The number of bitcoins generated per block is set to decrease geometrically, with a 50% reduction every 210,000 blocks, or approximately four years. The result is that the number of bitcoins in existence will not exceed slightly less than 21 million.

Speculated justifications for the unintuitive value “21 million” are that it matches a 4-year reward halving schedule; or the ultimate total number of Satoshis that will be mined is close to the maximum capacity of a 64-bit floating point number. Satoshi has never really justified or explained many of these constants.

Cumulated bitcoin supply

This decreasing-supply algorithm was chosen because it approximates the rate at which commodities like gold are mined. Users who use their computers to perform calculations to try and discover a block are thus called Miners.

First Time/Small Miner

First time/Small miner reference
for getting started.

If you want to start mining here is what you need… and what you need to know.

This is written for home miners/small farms, but can be used as a guideline for most operations. Use this as a reference for what you need to research, or what questions you need to ask before jumping in.

What you need to mine can be broken down into the following categories:

  • Hardware
  • Electricity
  • Location
  • Internet connection
  • Information

Mining BITCOIN is done exclusively with dedicated BITCOIN mining hardware based on ASICs: https://en.wikipedia.org/wiki/Application-specific_integrated_circuit .

You CAN NOT meaningfully mine bitcoin today with CPU, GPU or even FPGAs. Bitcoin difficulty adapts to match the amount of mining done on the network and has reached levels trillions of times too high to mine meaningfully with PCs, laptops, tablets, phones, webpages, javascript, GPUs, and even generalised SHA hardware.

Even if you combined all the computers in the world, including all known supercomputer, you would not even approach 0.1% of the bitcoin hashrate today.

There isn’t any point attempting to mine bitcoin with CPU or GPU even in the interests of learning as it shares almost nothing with how bitcoin is mined with ASICs and will not teach you anything.

Hardware

Asic Miner:

Here is a list of the companies currently manufacturing Miners for public purchase.

Each one has their Pro’s and Con’s it is up to you to do your research and decide what is best for you.

A few points to consider while researching are :

  • efficiency
  • reliability
  • warranty period/policy
  • power draw

Each company has a different way of handling warranty repairs, depending on your situation and the policy repairs can become cost prohibitive. I will touch more on efficiency and power draw in the electricity section.

• Current list of competitive hardware

Power supply: You will need to purchase a power supply to run your miners. You will find ATX and Server grade PSU’s, the latter being preferred for mining BTC. 

When it comes to selecting a PSU purchase something with a capacity 25% higher than your miner is rated to draw. This will have you operating within the 80% rule.(explained further in the electricity section)

EX. Miner draws 1000 PSU should be able to provide 1250W.

** Many current generation miners are now being manufactured with Integrated PSU. Again do your research to see if your unit comes with or without. Generally you will still need to source a power cable.**

Auxilliaries – Avalon miners require an external controller, 1 per 20 miners. You may have to run additional fans for intake and exhaust depending on your location.

PSU’s can be purchased large enough to run 2 Miners; or the opposite 1 Miner fed by 2 PSU’s. Ensure the PSU you have selected will have the correct amount of PCI-E connectors required to operate your miner(s)

You can also find a large supply of used miners and PSU’s. Again it’s up to you to do your research as these often are a no return transaction.

Electricity

Follow all local codes and regulations

This is the number 1 factor in whether mining is right for you. As discussed with Miners being a 24/7 machine drawing power those costs will make it cost prohibitive for some people to mine. You need to be aware of what your costs/kWh are and run the numbers.

This will be done in a profitability calculator. This is just an example of 1 there are many out there.

( Miner usage in kW ) * ( Hours run per day ) 24 * ( Cost/kWh ) = Cost per Day to Operate

( Ideally less than the FIAT value of BTC mined )

The second part to the electrical requirements of mining is the available service; written for North America.

You will need to figure out the amperage you can spare, what circuits and receptacles you have in place, are you setting up on 220V or 110V. You will need to make sure that you have the right cord end for your PSU to match the receptacle, picking the wrong one can cost you a few days of mining if it has to be shipped.

If you can try and set up on a 220V circuit for 2 reasons :

– You will pull half the amps, and it is more efficient.

– Doing so requires 2 breaker spaces in your panel. Breaker sizing will depend on how many miners you plan to run. Here is the formula for calculating amps.

Watts / Voltage = Amps

Here is where you will bring the 80% rule back into play by sizing the continuous miner load to 80% of the breaker rating. 12 Amps on a 15 Amp breaker, 16 Amps max on a 20 Amp breaker, 24 Amps on a 30 amp breaker.

If/when you increase the amount of miners you are running you may want to look into PDU’s, as opposed to more receptacles. 

Location

This is something that is often overlooked to the headache and frustration of many would be miners. These machines are loud and hot .
You essentially have an electric heater that also uses an industrial fan to keep it from melting itself. This space will need to have the electrical requirements as discussed previously.

So make sure you have a space that is well ventilated with a plan to exhaust heat, and bring in fresh dust free air. I say this as using AC to cool the room will eat into your profits and may even make mining unprofitable.

The noise issue is a consideration you can sort out depending on whats available. (garage, basement, remote building)

Both of these issues can be handled with hosting, which is further explained in the information section.

Internet connection

Some miner setups have the option to use wifi. It is advisable to use a wired connection where available. This will provide a more stable connection and ensure you are submitting the expected amount of shares which is directly related to your payouts.

Please note that mining uses a negligible amount of bandwidth, and will not affect your other internet usage.

Information

You can use this information in this post as a good baseline to get you going. In addition to this you will want to research network difficulty; this readjusts every 2016 blocks to maintain a 10 minute block time on average. While this can go down it generally increases.

Solo or Pool?

You can solo mine but this is essentially a lottery even as a large scale miner. Should you chose this you can check this out as a starting point.

solo.ckpool.org 1% fee solo mining USA/DE 250 blocks solved!

Odds are most of you will join a pool. I will only say that it is in your best interest to mine at a pool that pays transaction fees (miner rewards). Then you will want to consider the fees associated with the pool.

When it comes to these pools you want them to be large enough that they are getting at least 1 block every Difficulty adjustment period. Larger pools will offer smaller rewards paid out more frequently, and vice versa.

The Laws are Unjust

As we’ve seen over the many years that this rag has been written (and beyond) companies who are able to fund whole teams dedicated to data security have been wholly ineffective at storing that data safely.

With the passage of this new law EU officials are actively putting citizens in harm’s way by irresponsibly trying to force bitcoin users to collect and store each other’s data. This is if you believe that is the actual intention behind this move.

In reality, this move likely serves as a pure intimidation tactic to coerce people to use trusted third parties when transacting with bitcoin.

A heavy handed shove into easily controlled vectors. If too many users are in control of their own private keys, run their own nodes, and are up to date on best privacy practices when transacting it is much harder to stop bitcoin.

And make no mistake, these people want to stop bitcoin at all costs.

They do not want you to be free.

They are quickly losing their grasp of control on the populace and they are moving as quickly as possible to clamp down in an attempt to retain control.

You are not meant to have privacy in their eyes. You are inherently a criminal in their eyes. These people think you are disgusting cattle who needs to be led at every turn.

It does not have to be this way. You do not have to succumb to the madness of these people. All it takes are a few decisions.

Speak up!

Act!

Disobey!

There is a silent majority out there who knows this type of attempted control is inherently wrong.

It is anti-human!

It is evil!

This silent majority needs to begin developing the courage to speak up.

Call out the abject insanity of allowing unelected institutions like the Financial Action Task Force write freedom restricting guidelines that get adopted by governments like the EU.

Learn how to run your own node, how to produce your own private/public key pairs, and how to destroy chain analysis heuristics with privacy best practices.

Make the tyrant’s job as hard as possible!

Disobey!

Stand up and defend freedom in the Digital Age by actively defying their unjust laws.

“If a law is unjust, a man is not only right to disobey it, he obligated to do so.”

It is your duty as an individual to disobey these incredibly invasive and tyrannical “laws”.

If you don’t disobey your progeny may not have the opportunity to. The time to counter punch is right now. Get on it.

Source: https://tftc.io/

Knowledge is…

Knowledge is Power !!!

WRONG !!!
Knowledge is Power …
When Applied !!!

Apollo BTC – A Bitcoin ASIC Miner and Desktop Class Computer running a Full Node

Introducing the FutureBit Apollo BTC

Six CPU Cores. 44 ASIC Cores. 1TB NVMe Based SSD Drive. Quiet. Less than 200 Watts of Power. Made in the USA. This is what the Future of Bitcoin looks like. 

FutureBit Apollo BTC is the world’s first vertically integrated platform bringing the full power of Bitcoin and it’s mining infrastructure in a small, quiet, easy to use desktop device designed for everyday people. 

We have iterated and learned much from our first Apollo product. We realized early on that we focused too much on the mining aspect, and not enough on the software, applications, and services that run Bitcoin. Too many of these services have moved to online centralized websites, and many users have given up on running the core software that powers Bitcoin. 

This must change, as Bitcoin will not continue to be the free, un-censorable, decentralized system it is today if only a few control the mining that powers it, and the nodes that control it. 

At the heart of the new Apollo BTC product is a revamped SBC (Single Board Computer), that is as powerful as any consumer grade desktop system and can run almost any Bitcoin Application natively on the device 24/7. Take it out of the Box, plug it in, power it on, and you are already running a full Bitcoin node without needing to do anything.

Install a wallet of your choice, use any hardware wallet, run BTCPayServer, run a block explorer, run a Lightning Node. All of this is possible with our six core ARM based CPU with 4GB of RAM, and a 1TB NVMe drive that can easily store a FULL non pruned Bitcoin Node. It can power through a Full Node Sync in under 48 hours, which is a record for a device of its class! This is almost an order of magnitude faster than any Raspberry Pi 4 based Node. 

On top of this we have taken our 6 years of experience building ASIC mining devices, and engineered the only American Made TeraHash range Bitcoin mining device that can be silent on your desk, mine Bitcoin in the background 24/7, and only use the power of one light bulb to do it. 

We did this with our optimized PCB design that has carefully placed all 44 hash cores underneath our custom cold-forged aluminum induction heatsink, which draws up to 200 Watts of heat away from the device with our new nearly silent 25mm fan. This results in the Apollo BTC in Turbo Mode being just as quiet as the Apollo LTC in Eco Mode!

Like our previous products, we are super proud that we can continue manufacturing the Apollo BTC in the USA, and are now the only USA based company that delivers Bitcoin ASIC products with a supply chain whole owned in the western hemisphere (no more reliance on Chinese based ASICS, and their willingness to only sell to large farms and the highest bidder). 

OPTIONS

Full Apollo Package: This is our Full Package option that comes with everything you need in the box. The Apollo BTC Unit with our latest controller built in, and our 200W Power supply with power cable. 

Full Apollo Package NO Power Supply: We are also offering the Full Package with no power supply for people that want the plug-n-play experience but have spare 12v ATX power supply. 

Standard: This option is ONLY the Apollo ASIC Miner, with no controller or power supply. Our new hashboard has a micro USB port, and can be used as a USB device. The Full Apollo Node can control multiple standard units through its USB ports. We wanted to give our customers an option to expand their hash power in a cost effective way. If you already have a Raspberry Pi, or Linux/Windows Desktop Computer and a power supply with two PCIE power ports you can also control our Standard unit in this way with our stand alone miner software (please note this setup will be for more advanced users, and the software will be command line based on launch). 

Standard + Power Supply: Same as our Standard unit above, but comes with our 200W Power supply. This is a plug and play solution if you already have a Full Apollo Package. Take it out of the box, plug in the power supply, plug in the micro USB cable to the back of your Full Apollo BTC and it will automatically recognize the second hashboard and start mining! 

  • Compact All-In-One Desktop Bitcoin System (4x6x4in) that mines Bitcoin and any SHA256 based crypto (Bitcoin Cash etc). 
  • Powerful 6 ARM Core CPU with 4GB of LPDDR4 RAM and 1TB NVMe SSD (NOT included in the Standard or Standard + package). 
  • Comes Pre-Installed with a Bitcoin node, and you can install almost any Bitcoin Application
  • Very wide range of operation modes with preset ECO (quiet) mode, BALANCED, and TURBO mode. 
  • 2-3.8 TH/s of SHA256 performance per miner (+/- 5%)
  • 125 Watts in ECO mode, and 200 Watts in TURBO * +/- 10%
  • Can be used as a full Desktop computer with a monitor keyboard and mouse (not included), or through our Web UI
  • Connect almost any peripheral with our USB 3.0 ports, USB C port, HDMI, AC Wifi, and Bluetooth 
  • Clocks and Power is fully customizable by user with easy to use interface
  • Hashboard now monitors both voltage and power draw for accurate measurements*
  • Custom designed cold forged hexagonal pin heatsink with leading thermal performance for the quietest ASIC miner in operation!
  • 1k-5k RPM Quiet Dual Ball Bearing Fan with automatic thermal management with onboard temperature sensor
  • Controlled via local connection on a web browser similar to antminers. You can simply set it up via smartphone browser. No crazy driver installs, hard to use miner software or scripts needed.
  • Two Six Pin PCIE power connectors for wide-range of power draw
  • Custom Designed all Aluminum case
  • Ships with our own custom built 200W 94% efficient PSU and is ready to run out of the box! (Does NOT come with Standard package). 

 Requirements:

  • Router with an Ethernet cable for initial setup OR Monitor with keyboard and mouse
  • At least a 250 watt 12v power supply with two 6 Pin PCIE connector is required (unless you order our packages that come with our power supply). This is the same connector used by all modern GPUs. Please note even standard units NEED a power supply, they cant be powered through the USB port on the full package unit. 

As I am the owner of two of these beauties, that I have on my office as you saw in the photo above, I took the liberty to make Free-Publicity for the FutureBit Apollo Btc Miner.

Kudos to jstefanop

Source:

https://www.futurebit.io/

With 💚

Trilemma of International Finance

Trilemma of International Finance

The relative value of any two curren-
cies—the exchange rate—is determined
through their sale and purchase on the global foreign exchange market. If government policy interferes with this market by changing the relative supply or demand of currencies, the exchange rate is managed.

The trilemma of international finance, is a restriction on government policy that follows immediately from the interaction of exchange rates, monetary policy and international capital flows.

Trilemma of International Finance

The trilemma states that any country can have only two of the following:

  • (1) Unrestricted international capital markets.
  • (2) A managed exchange rate.
  • (3) An independent monetary policy.

If the government wants a managed exchange rate but does not want to interfere
with international capital flows, it must use
monetary policy to accommodate changes
in the demand for its currency in order to
stabilize the exchange rate.

In the extreme, this would take the form of a currency board arrangement, where the domestic currency is fully backed by a foreign currency (as in the case of Hong Kong).

In such a situation, monetary policy can no longer be used for domestic purposes (it is no longer independent).

If a country wishes to maintain control over monetary policy to reduce domestic unemployment or inflation, for example, it must limit trades of its currency in the international capital market (it no longer has free international capital markets).

A country that chooses to have both unrestricted inter-national capital flows and an independent monetary policy can no longer influence its exchange rate and, therefore, cannot have a managed exchange rate.

Pieters and Vivanco (2016), government
attempts to regulate the globally accessible
bitcoin markets are generally unsuccessful,
and, as shown in Pieters (2016), bitcoin exchange rates tend to reflect the
market, not official exchange rates.

Should the flows allowed by bitcoin become big enough, all countries will have, by default, unrestricted international capital markets.

Thus, with bitcoin, (1) unrestricted
international capital markets is chosen by
default.

Therefore, the only remaining policy choice is between (2) managed exchange rates or (3) independent monetary policy.

If the country chooses (1) and (2), it must use reactive monetary policy to achieve the managed exchange rate.

If the country chooses (1) and (3), it must have a floating exchange rate because it has no remaining tools with which to maintain a managed exchange rate.

Ali et al. (2014), the European Central
Bank (2015) and the Bank for International
Settlements (2015) all concur that cryptocur-
rencies may eventually undermine monetary policy.

With 💚