Bitcoin has a number of important dates, from the creation of the genesis block to regular halvings. However, one of them cannot be found in the protocol itself. Every year on August 21st, part of the Bitcoin community celebrates the so-called Bitcoin Infinity Day. Behind the seemingly simple play on the date 8/21 lies one of the most important characteristics of the world’s largest cryptocurrency – there should never be more than 21 million bitcoins.
Table of Contents – Bitcoin Infinity Day:
- What is Bitcoin Infinity Day?
- Why exactly 21 million bitcoins?
- Limited supply is one of the main differences from traditional currencies
- Can anyone change the 21 million bitcoin limit?
- Does a limited number of bitcoins mean their price must rise?
- Even one bitcoin doesn't have to be unattainable for investors
- For investors, Bitcoin Infinity Day is primarily a reminder of Bitcoin's economics
- FAQ: Bitcoin Infinity Day
What is Bitcoin Infinity Day?
Bitcoin Infinity Day is an unofficial holiday in the Bitcoin community, which falls on August 21st. It is not an event embedded in the Bitcoin protocol, a technical network update, or a halving equivalent. It is primarily a symbolic day commemorating Bitcoin’s limited supply.
The key is the American date notation 8/21. The digit eight, when rotated 90 degrees, resembles the infinity symbol ∞, while the number 21 refers to the maximum amount of bitcoins that can be created according to the network’s rules – 21 million BTC.
The result is a symbolic equation:
∞ / 21,000,000
This is based on an idea popularized by Bitcoin author Knut Svanholm: “Everything there is, divided by 21 million”.
Svanholm published the text Deeper Down the Rabbit Hole on August 21, 2020. The date of its publication subsequently became the basis for Bitcoin Infinity Day. According to Bitcoin Magazine, the original timing of the article was not intentional, and the first Bitcoin Infinity Day began to be celebrated more prominently in 2021.
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Why exactly 21 million bitcoins?
The number 21 million is crucial for Bitcoin. Unlike regular currencies, it is not possible to create new units without a predetermined limit.
Bitcoin operates according to a predictable issuance schedule. New BTC are created as part of the reward to miners for mined blocks. Approximately once every four years, more precisely every 210,000 blocks, a so-called halving occurs, in which the newly issued amount of bitcoins is reduced by half. As Bitcoin.org explains, it is this mechanism that ensures predictable issuance and a final limit of approximately 21 million coins.
At the beginning of the Bitcoin network in 2009, the block reward was 50 BTC. Through successive halvings, it has been reduced to the current 3.125 BTC per block after the halving in April 2024.
The process will continue for several more decades. According to Fidelity Digital Assets, the 21 million BTC limit will be practically reached around the year 2140.
This does not mean that the network will stop functioning after the last bitcoin is mined. In addition to newly issued bitcoins, miners also have income from transaction fees.
Limited supply is one of the main differences from traditional currencies
It is precisely the fixed supply that is among the arguments why Bitcoin supporters refer to the cryptocurrency as a form of “digital gold”.
With traditional fiat currencies, such as the dollar, euro, or Czech koruna, the number of existing monetary units is not strictly limited. Central banks can influence the money supply depending on the economic situation.
Even the supply of gold is not absolutely fixed. If its price rises over the long term, it may become economically viable to mine deposits whose exploitation was previously too expensive.
With Bitcoin, the situation is different. A higher BTC price may attract more miners to mining and increase the network’s power, but it does not in itself cause faster creation of new bitcoins. Approximately every two weeks, the network adjusts the mining difficulty so that blocks continue to be created on average approximately once every ten minutes.
Can anyone change the 21 million bitcoin limit?
A common question is whether the 21 million limit is truly final. Bitcoin is, after all, software, and software can be modified.
Theoretically yes. Practically, however, changing one of Bitcoin’s most fundamental rules would require broad support from participants in the decentralized network.
Bitcoin does not have a central institution that could simply decide that instead of 21 million, 30 or 50 million BTC will be mined, for example. Individual network nodes choose for themselves the software and rules they accept.
The economic incentives of bitcoin holders are one of the reasons why changing the limit would be extremely difficult. Increasing the maximum supply would dilute the scarcity of existing bitcoins, which would be contrary to the interests of their owners.
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Does a limited number of bitcoins mean their price must rise?
This is where it’s necessary to separate the symbolism of Bitcoin Infinity Day from investment reality. Limited supply alone does not guarantee price growth.
The price of any asset arises from the collision of supply and demand. If something is rare but nobody wants to own it, scarcity alone will not create a high price.
The same principle applies to Bitcoin. The maximum number of 21 million BTC may be an important part of its investment story, but the future price also depends on investor demand, regulation, cryptocurrency usage, the macroeconomic environment, market sentiment, or competition from other assets.
Bitcoin Infinity Day is therefore not a reason to expect that the price of BTC will automatically rise on August 21st.
Even one bitcoin doesn’t have to be unattainable for investors
The amount needed to purchase one whole bitcoin may seem high for small investors. However, bitcoin doesn’t need to be purchased in whole units.
One BTC can be divided into 100 million satoshi, with one satoshi representing 0.00000001 BTC. An investor can thus own just a very small fraction of one bitcoin.
The limit of 21 million BTC therefore does not mean that only a limited number of people could own bitcoin. Bitcoin.org points out that divisibility to eight decimal places allows for the use of even very small units of this cryptocurrency.
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For investors, Bitcoin Infinity Day is primarily a reminder of Bitcoin’s economics
Bitcoin Infinity Day does not change the network rules, does not reduce miner rewards, and has no direct impact on the amount of bitcoin in circulation. From an investment perspective, it is primarily a reminder of a feature that distinguishes Bitcoin from most traditional monetary systems.
Its future supply can be predicted decades in advance to a large extent. It is precisely the combination of August 21st, the infinity symbol, and the final number of 21 million BTC that turned what was originally a simple community meme into an annual bitcoin tradition.
And at the same time, it reminds us of one of Bitcoin’s most interesting paradoxes: a digital asset that can be virtually infinitely copied as software has created, through cryptography and decentralized consensus, a system in which the bitcoins themselves are strictly limited in quantity.
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FAQ: Bitcoin Infinity Day
When is Bitcoin Infinity Day?
Bitcoin Infinity Day falls annually on August 21st. The date in American format is written as 8/21. The number eight when rotated resembles the infinity symbol, and the number 21 refers to the maximum supply of 21 million bitcoins.
What does Bitcoin Infinity Day mean?
It is an unofficial community celebration commemorating Bitcoin’s limited supply. It is associated with the idea “everything that exists, divided by 21 million.”
How many bitcoins can exist at maximum?
Bitcoin’s emission mechanism is directed toward a maximum supply of approximately 21 million BTC. New bitcoins are created increasingly slowly due to regular halvings.
When will the last bitcoin be mined?
According to the current emission schedule, this should occur approximately around the year 2140. The exact date depends on the actual speed of block generation.
Does Bitcoin Infinity Day affect the price of bitcoin?
Bitcoin Infinity Day is not a technical event of the bitcoin network and does not change the supply of BTC. Therefore, there is no mechanism that would automatically increase the price of bitcoin solely because of this date. The price continues to depend primarily on supply and demand in the market.
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