On March 9, 2026, the Bitcoin network quietly crossed one of the most iconic milestones in its history — the 20 millionth coin was mined. This means 95.24% of all Bitcoin that will ever exist is already in circulation, and mining the final million will take more than a century.
How it happened
The 20 million coin threshold was crossed at block height 939,999 with the current block reward of 3.125 BTC. The block was confirmed by Foundry USA, one of the largest mining pools. Although the event was not accompanied by fanfare or special ceremonies, it attracted significant attention from the crypto community as a symbolic moment in the protocol's life.
From the launch of the network by Satoshi Nakamoto in January 2009 to this moment, just over 17 years have passed. During this time, Bitcoin evolved from an obscure experiment into an asset with a market capitalization exceeding $1.4 trillion.
Why the last million will take so long
The answer lies in the halving mechanism — a programmed reduction of the block reward by half approximately every 210,000 blocks (about 4 years). The most recent halving occurred on April 20, 2024, when the reward decreased from 6.25 BTC to 3.125 BTC per block. The next halving is expected in 2028, when the reward will drop to 1.5625 BTC.
Each subsequent halving cuts the rate of new coin issuance in half, creating a deflationary supply curve. While approximately 450 BTC are currently mined daily, after the next halving this figure will fall to roughly 225 BTC per day. With each cycle, the number of new coins becomes progressively smaller.
What it means for price
Scarcity is one of the fundamental arguments supporting Bitcoin's value appreciation. With each halving, the new supply of coins decreases while demand — at least historically — continues to grow driven by institutional adoption and an expanding user base.
The classic Stock-to-Flow model, which evaluates asset scarcity through the ratio of existing supply to new production, shows an even stronger position for Bitcoin after the 20 million milestone as one of the scarcest assets in the world — alongside gold and platinum.
Lost coins
It is important to understand that not all 20 million Bitcoin are actually available for use. According to various estimates, between 3 and 4 million coins are considered permanently lost — due to misplaced private keys, transfers to incorrect addresses, or the death of owners without access transfer. This makes the actual circulating supply significantly smaller than the nominal figure.
Coins from Satoshi Nakamoto's so-called genesis block, along with over a million BTC mined during the network's early days and never moved, constitute a separate category whose fate is a subject of ongoing debate.
Historical significance
The mining of the 20 millionth coin underscores Bitcoin's unique nature as the world's first truly scarce digital asset. Unlike fiat currencies that central banks can print without limit, or gold whose supply gradually increases as new deposits are discovered, the maximum quantity of Bitcoin is strictly limited by its mathematical protocol. This event reminds the market of the fundamental value of programmatic scarcity in an era of unlimited monetary expansion.
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