Sometime in March 2026, the Bitcoin network crossed a milestone that its creator had embedded in the protocol’s code from the very beginning: the twenty millionth Bitcoin was mined. Of the total supply of twenty-one million coins that will ever exist, twenty million have now been released into circulation. The final million coins will be issued at a rate that diminishes over time, with the last Bitcoin not expected to be mined until approximately the year 2140 — more than a century from now.
The milestone is significant less as an immediate catalyst for price movement and more as a reminder of what makes Bitcoin’s monetary policy distinctive. Unlike any fiat currency, whose supply is determined by the ongoing decisions of central banks and governments, Bitcoin‘s issuance schedule was written in code at the network’s inception and has followed that schedule with clockwork precision ever since. No committee meets to decide how many new Bitcoin to release. No authority can choose to increase the supply in response to economic conditions. The rules were set, and the rules have been followed.
The diminishing rate of new supply is baked into the protocol through the halving mechanism, which cuts the reward issued to miners for each block they add to the blockchain in half approximately every four years. The most recent halving, which occurred in April 2024, reduced the block reward to 3.125 Bitcoin. The next halving, expected in 2028, will reduce it further to 1.5625 Bitcoin. Each successive halving compresses the rate of new supply addition, making the scarcity increasingly pronounced over time.
What the twenty million milestone obscures, however, is that a meaningful portion of those coins may no longer be accessible. Estimates of lost Bitcoin — coins whose private keys have been misplaced, destroyed, or whose owners have died without leaving access credentials — vary widely but generally cluster around three to four million coins. If those estimates are accurate, the effective circulating supply may be considerably below twenty million, with the realistic ceiling for recoverable Bitcoin sitting somewhere in the seventeen to eighteen million range.
For the argument that Bitcoin functions as digital gold, the milestone serves as a useful reference point. Gold’s supply grows by roughly one to two percent annually as new deposits are mined, and that rate is expected to continue indefinitely. Bitcoin‘s effective growth rate has already fallen below that threshold and will continue to decline. By the time the final Bitcoin is mined more than a hundred years from now, the new issuance rate will have fallen to essentially zero — a property that no other major asset class can claim to offer on a verifiably scheduled basis.
The broader symbolic weight of the twenty million mark was not lost on the Bitcoin community. Forums, podcasts, and social media filled with retrospectives on the network’s journey from a technical curiosity worth fractions of a cent to an asset with a market capitalisation exceeding one trillion dollars. Whatever one’s view on Bitcoin’s ultimate destiny, the milestone offered an opportunity to reflect on the degree to which a piece of software written by an unknown individual had reshaped the global conversation about money, value, and trust.