Bitcoin (BTC) has a maximum supply of 21 million coins. This is a limit set in its protocol by its creator, Satoshi Nakamoto.
Bitcoin Supply Details:
Maximum Total Supply: 21,000,000 BTC
Current Circulating Supply: Approximately 19.6 million BTC (as of 2025)
Lost Bitcoins: It is estimated that several million BTC have been lost forever due to owners forgetting their private keys or passing away.
Bitcoins Left to Mine: Less than 1.4 million BTC
Mining & Halving Process
Bitcoin is mined through a Proof-of-Work (PoW) process, with rewards given to miners.
Halvings occur every 4 years, reducing the block reward by 50% to slow down the creation of new BTC. The last halving occurred in April 2024, reducing the reward from 6.25 BTC per block to 3.125 BTC per block.
The next halving is expected to occur in 2028.
When Will All Bitcoins Be Mined?
It is estimated that the last Bitcoin will be mined around 2140, due to the decreasing block reward after each halving.
Once all BTC are mined, the network will continue to run with incentives from transaction fees as the main source of income for miners.
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