Bitcoin is steadily nearing its fixed cap of 21 million coins, with over 95 percent of the total supply already mined and in circulation.
Data from the Clark Moody Dashboard shows that 19,996,979 BTC have already been mined, leaving approximately 3,000 BTC before the network reaches the milestone of 20 million bitcoins, a mark that, at current issuance rates, is expected to be achieved in about a week.
Once surpassed, over 95 percent of Bitcoin’s capped 21 million supply will be in circulation, with the remaining 1 million coins set to be gradually mined over the course of the next century, largely due to the programmed halving mechanism that slows issuance over time.
This diminishing rate of supply underscores Bitcoin’s built-in scarcity framework and reinforces its long-term value narrative.
What is halving?
A defining feature of Bitcoin (BTC) is its strictly limited supply. Its creator embedded a hard cap into the protocol to ensure that no more than 21 million coins would ever exist. This built-in scarcity mechanism is intended to enhance Bitcoin’s deflationary nature over time, potentially supporting higher demand and long-term price appreciation.
New bitcoins enter circulation roughly every 10 minutes, which corresponds to the average time required to validate and add a new block to the blockchain. As part of the protocol’s monetary design, the reward granted to miners is reduced by 50 percent every 210,000 blocks, approximately once every four years, through an event known as the “halving.”
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What happens to Bitcoin after all 21 million are mined?
Once Bitcoin reaches its maximum supply, potentially slightly below the 21 million cap due to rounding mechanisms in the protocol, no additional coins will be created.
Reaching this ceiling will have important implications for miners, though the overall impact will depend on how Bitcoin develops over time. Transactions will still be grouped into blocks and validated, but miners will no longer receive block rewards in newly minted bitcoins. Instead, their compensation will come exclusively from transaction fees.
If, in over 100 years, Bitcoin primarily functions as a store of value rather than a medium for everyday transactions, mining could remain economically viable even without block subsidies.
In such a scenario, miners may rely on higher fees from large-value or bundled transactions. Meanwhile, more efficient layer-2 solutions, such as the Lightning Network, could handle smaller, routine payments while settling periodically on the base Bitcoin blockchain.
