One of Bitcoin’s most unique features is that its total supply is limited to 21 million units.
This limit was set in the original Bitcoin code by its creator, who goes by the pseudonym Satoshi Nakamoto, and cannot be changed at will by any government or central bank.
This means that once all 21 million Bitcoins have been mined, no more new Bitcoins will be created.
However, the Bitcoin network will not stop operating.
Transactions can still continue as usual, but miners will no longer receive new Bitcoins as rewards.
How Are Bitcoins Created?
New Bitcoins can only be created through the process of mining.
Miners use high-powered computers to verify transactions and add new blocks to the blockchain. As a reward, they receive new Bitcoins as well as transaction fees from users.
In 2009, the mining reward was 50 Bitcoins per block. However, this reward will be halved every four years or so through a process known as halving.
The reward has dropped from 50 BTC to 25 BTC, then 12.5 BTC, 6.25 BTC and now just 3.125 BTC after the halving in 2024.
The next halving is expected to occur around 2028, when the reward will decrease again to 1.5625 BTC.
When Will Bitcoin Be Mined?
As of early 2026, over 95% of the total Bitcoin supply has been mined. The 20 millionth Bitcoin was successfully mined in March 2026, leaving less than a million Bitcoins left to enter the market.
Because the mining reward gets smaller after each halving, the remaining Bitcoins are expected to take over 100 years to be fully mined.
According to current estimates, the last Bitcoin is expected to be mined around 2140.
What Happens After 21 Million Bitcoins Are Reached?
When the last Bitcoin is mined, the total supply will remain at almost 21 million units forever.
No new Bitcoins will be created because the network will reject any attempts to produce more than that limit.
However, the Bitcoin blockchain will continue to operate as usual.
Transactions will still be processed and confirmed, and miners will earn their income entirely from transaction fees paid by users, not from new Bitcoins.
What Does This Mean for Investors?
Bitcoin’s limited supply has often led to comparisons to gold because it is hard to obtain and cannot be printed at will.
If demand continues to increase while supply remains constant, many investors believe this could support Bitcoin’s value in the long term.
For this reason, more and more companies and financial institutions are starting to use Bitcoin as a store of value.
Companies like Tesla and Strategy have purchased Bitcoin as part of their company assets. In addition, Bitcoin exchange-traded funds (ETFs) have also made it easier for institutional investors to gain exposure to Bitcoin without having to hold the asset directly.
Overall, the 21 million Bitcoin cap is the main difference between Bitcoin and fiat currencies. Although no new Bitcoins will be created after 2140, the Bitcoin network is expected to continue operating as usual with miners relying on transaction fees as their primary source of income.
