Bitcoin has surpassed a key supply milestone, with the network producing its 20 millionth BTC and leaving fewer than one million coins to be issued under its 21 million hard cap. The event highlights Bitcoin’s fixed-supply design and the growing focus on scarcity within digital asset markets.
Scarcity milestone for Bitcoin
Reaching 20 million mined coins means roughly 95% of Bitcoin’s total supply is now in existence. The remaining sub-5% will be issued on a diminishing schedule over more than a century due to Bitcoin’s programmed “halving” events, which cut the block subsidy roughly every four years. The final bitcoin is projected to be mined around the year 2140.
While 20 million BTC have been created, the number of coins available for trading is smaller, as some early holdings are believed to be lost or inaccessible.
How issuance slows from here
Bitcoin’s block reward dropped to 3.125 BTC per block in April 2024, reducing the pace of new supply. With an average of about 144 blocks mined per day, annual issuance now approximates 164,000 BTC, a figure that will halve again at the next scheduled event expected around 2028. As subsidy declines, transaction fees are set to play a larger role in miner revenues over time.
Industry reaction
Industry participants framed the milestone as a validation of Bitcoin’s predictable monetary policy. “A digital money system with transparent, predictable, and ultimately scarce supply… has rising appeal in today’s economy due to fiat currency tail risks,” said Grayscale.
Why it matters
The 20 million threshold reinforces a core feature that differentiates Bitcoin from fiat currencies: a hard-capped, rules-based supply. With fewer than one million BTC left to be issued and the rate of new supply falling, investors and market observers are likely to keep a close eye on how scarcity and demand dynamics evolve in the coming years.