On March 9, 2026, block 939,999 was confirmed by Foundry USA, and with it, the 20 millionth Bitcoin entered circulation. It took the network 17 years and two months to reach this point. Only 1 million BTC remain to be mined, and those final coins will take more than 114 years to produce.

This is one of the few moments in Bitcoin’s history that was both perfectly predictable and genuinely historic. Satoshi Nakamoto hard-coded the 21 million supply cap into the protocol in 2009. Every miner, investor, and analyst alive today has known this day was coming. And yet, watching it arrive still lands differently.

What the numbers actually say

More than 95% of all Bitcoin that will ever exist is now in circulation. Due to rounding in Bitcoin’s consensus rules, the true ceiling falls just short of a round number - the maximum supply is 20,999,999.9769 BTC, not a clean 21 million.

Around 450 BTC are mined each day right now. After the April 2028 halving, that drops to roughly 225 per day. By the 2040s, daily issuance will fall below 30 BTC. By the 2060s, below 2. The last satoshi is projected to be mined sometime around 2140.

Lost coins make it scarcer than it looks

The 20 million figure is already an overstatement of the usable supply. Blockchain analytics firms River Financial and Chainalysis estimate that somewhere between 2.3 million and 3.7 million BTC are permanently inaccessible - locked in wallets whose keys were lost, owned by people who died without passing on access, or sitting in addresses nobody controls. Strip those out and the effective circulating supply is closer to 16 to 17 million coins.

Combine that with ETF inflows, corporate treasury buying, and long-term holders who treat their Bitcoin as a vault rather than a trading account, and the liquid supply available on any given day is a fraction of what the on-chain data suggests.

The “Era of Scarcity” is now

Kraken’s chief economist Thomas Perfumo called it plainly: Bitcoin has entered the “Era of Scarcity.” Over 95% of the supply is already out, the issuance curve is bending steeply downward, and no authority anywhere can change that schedule.

That’s the core claim Bitcoin makes that no other monetary asset can match. The remaining supply is known to the exact satoshi. The remaining issuance schedule is public and immutable. Gold miners can find a new deposit. Central banks can print. Bitcoin cannot do either.

What it means for miners

The milestone also marks a tightening constraint for the people who secure the network. Foundry USA, the miner that confirmed block 939,999, is one of the largest mining pools in the world, but analysts at Needham & Company expect many publicly traded miners to exit Bitcoin mining entirely around the 2028 halving, pivoting to AI computing workloads where margins hold up better.

As block rewards shrink, miners become more dependent on transaction fees to cover costs. That transition - from subsidy-driven security to fee-driven security - is one of the most important open questions in Bitcoin’s long-term design. The protocol assumes fees will rise to fill the gap. Whether they actually do won’t be known for decades.

The last million

One million BTC left. 114 years to go. The math has always been there, but watching it become real is something else.

This article is informational only and does not constitute financial advice.