It’s Time to Admit It – There Are Only 2.1 Quadrillion Bitcoins

If the above statement offends you, you might not have read the Bitcoin source code.

Of course, I’m sure you’ve heard that there are 21 million bitcoin – and this is true, the Bitcoin protocol allows for only “21 million bitcoin” to be created, yet these larger denominations can be subdivided into 100 million sub-units each.

Call them whatever you want, there are only 2.1 quadrillion monetary units in the protocol.

This dollars and cents differential has long been the subject of debate – in the time of Satoshi, Bitcoin’s creator, the dual conventions, Bitcoin having both a bulk denomination, and a smaller unit, was not much of a concern. There were questions about whether the software would work at all, and bitcoin were so worthless, selling them in bulk was the only rational option.

Rehashing this debate is BIP 21Q, a proposal to the Bitcoin users authored by John Carvalho, founder of Synonym, creator of the Pubky social media platform, and a tenured contributor whose work dates back to the days of the influential Bitcoin-assets collective.

In short, the BIP proposes that network actors – the various wallets and exchanges – change how Bitcoin denominations are displayed, with the smallest unit of the protocol renamed “bitcoins,” as opposed to “satoshis,” as they have been commonly called.

Here are the specifics of the BIP:

Redefinition of the Unit:

• Internally, the smallest indivisible unit remains unchanged.
• Historically, 1 BTC = 100,000,000 base units. Under this proposal, “1 bitcoin” equals that smallest unit.
• What was previously referred to as “1 BTC” now corresponds to 100 million bitcoins under the new definition.

Terminology:

• The informal terms “satoshi” or “sat” are deprecated.
• All references, interfaces, and documentation SHOULD refer to the base integer unit simply as “bitcoin.”

Display and Formatting:

• Applications SHOULD present values as whole integers without decimals.
• Example:
• Old display: 0.00010000 BTC
• New display: 10000 BTC (or ₿10000)

Unsurprisingly, the debate around the BIP has been hostile. For one, it’s not a technical BIP, though this is not a requirement of the BIP process. Suffice to say, it’s perhaps the most general BIP that has been proposed under the BIP process to date, as it mainly deals with market conventions and user onboarding logic, not any changes to the software rules.

However, I have to say, I find the proposal compelling. Nik Hoffman, our News Editor, does not, preferring to stick to the market affirmative.

Yet, I think the proposal raises relevant questions: why should new users be forced to compute their Bitcoin balances using only decimals? Surely this has the adverse side effect of making commerce difficult – it’s simply antithetical to how people think and act today.

Also, in terms of savings, at an $100,000 BTC price, it isn’t exactly compelling to think you could be spending a whole year earning 1 BTC, though that may be.

Indeed, there have been various debates for all kinds of units – mBTC, uBTC – that play around with the dollars and cents convention, but Carvalho here is wisely skipping to the end, preferring just to rip the band-aid off. $1 would buy 1,000 bitcoins under his proposal.

What’s to like here, and I argued this during a Lugano debate on the topic in 2023, is that it keeps both the larger BTC denomination and the smaller unit, now bitcoins. They are both important, and serve different functions.

My argument then was that having a larger denomination like BTC (100 million bitcoins) is important. If there was no “BTC unit,” the press and financial media would be faced to reckon that “1 bitcoin” is still worth less than 1 cent. 

How much mainstream coverage and interest do we think there would be? I’d bet not very much.

In this way, BIP 21Q is a best-of-both-worlds approach.

The financial world, press, and media can continue championing the meteoric rise in value of “BTC,” while everyday users can get rid of decimals and complex calculations, trading the only real Bitcoin unit guaranteed to exist in perpetuity. 

This article is a Take. Opinions expressed are entirely the author’s and do not necessarily reflect those of BTC Inc or Bitcoin Magazine.

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