Bitcoin's 20 Millionth Coin Has Been Mined. Only 1 Million Remain.

On March 10, 2026, Foundry USA mined block 939,999 and with it, the 20,000,000th bitcoin entered circulation. No press conference. No countdown timer. The milestone passed in the time it took to validate a block — roughly ten minutes — and the network moved on to block 940,000 as if nothing had happened.

But something had happened. Ninety-five percent of all bitcoin that will ever exist is now in someone's hands — or lost to no one. The remaining five percent, approximately 1,000,000 BTC, will be distributed to miners over the next 114 years, in amounts that halve every four years until the final satoshi is issued sometime around 2140.

This is not a rounding error in monetary history. It is the completion of a supply schedule that has been running, uninterrupted, since January 3, 2009.

The Asymmetry by Design

Bitcoin's supply schedule is one of the few things in economics that is genuinely fixed. Not targeted. Not aspirational. Not subject to committee review. Fixed.

| Milestone | Date | Time to Mine | |---|---|---| | First 10 million BTC | Jan 2009 – Nov 2012 | ~4 years | | Next 5 million BTC | Nov 2012 – Jul 2016 | ~4 years | | Next 2.5 million BTC | Jul 2016 – May 2020 | ~4 years | | 19M to 20M BTC | Apr 2025 – Mar 2026 | ~11 months | | Final 1 million BTC | Mar 2026 – ~2140 | ~114 years |

Satoshi Nakamoto designed the emission curve as a geometric series — each halving cuts the rate in half, creating an ever-steeper approach toward the 21 million cap. The first half of all bitcoins was mined in four years. The last million will take more than a century.

At the current rate of 3.125 BTC per block, miners produce roughly 450 BTC per day, or about 164,250 per year. After the 2028 halving, that drops to roughly 82,000. After 2032, roughly 41,000. Each cycle makes new supply less relevant to the total — and more precious to those competing for it.

The Supply That No Longer Exists

Here is the part that makes the 20 million milestone more significant than it appears: a meaningful fraction of those coins no longer exist in any practical sense.

Chainalysis estimates that between 3.0 and 3.7 million BTC are permanently inaccessible — locked in wallets whose keys have been lost, sent to provably unspendable addresses, or belonging to people who died without passing on their credentials. The largest known stash belongs to Bitcoin's creator. Approximately 1.1 million BTC, mined in the earliest months of the network, sit in addresses attributed to Satoshi Nakamoto. Not a single satoshi has ever moved from these wallets.

At current prices, Satoshi's holdings are worth approximately $75 billion — enough to make Bitcoin's anonymous creator one of the wealthiest individuals on Earth, if the coins could be spent. After 17 years of complete inactivity, the consensus view is that they never will. Whether Satoshi lost the keys, chose not to spend them, or is no longer alive is unknown. The practical effect is the same: 1.1 million BTC are functionally removed from the supply.

If we take the midpoint estimate of 3.35 million BTC effectively destroyed, then the circulating supply is not 20 million. It is closer to 16.65 million. And the 1 million coins yet to be mined represent not 5% of the eventual total, but closer to 5.7% of the effective supply. Unlike gold, which can be recovered from shipwrecks or recycled from electronics, a lost bitcoin is lost with mathematical finality. The entropy is permanent.

What 95% Mined Means for Miners

For miners, the milestone is a reminder that their business model has an expiration date — not imminent, but visible on the horizon.

The block subsidy currently accounts for approximately 84% of miner revenue, with transaction fees making up the remaining 16%. Over the next several halvings, this ratio must invert for the network's security model to remain viable. The transition from subsidy-dependent to fee-dependent security is Bitcoin's most important long-term challenge.

The optimistic view: as Bitcoin's value increases and transaction volume grows — particularly through Layer 2 settlement — fees will naturally fill the gap. Lightning Network channel opens and closes, Liquid Federation transactions, and on-chain settlement of larger values all generate fees. The pessimistic view: fees have never sustained mining economics alone, and there is no guarantee they will. The block space market is constrained by the 4MB weight limit, and fee pressure during congestion leads to user complaints, not celebration.

Both views are defensible. The answer will unfold over decades, not quarters.

The Hardest Money Ever Created

As of today, Bitcoin's annual inflation rate is approximately 0.83%. Gold adds 1.5 to 2.0% to its above-ground stock each year. The US dollar's M2 supply expands at roughly 6 to 7%. Bitcoin is already harder than gold by supply issuance. After the 2028 halving, it will be harder by a factor of four. After 2032, by a factor of eight.

This trajectory is not a projection or a forecast. It is code that has already been written, reviewed, and running without modification for seventeen years. No central bank can make this claim. No commodity can make this claim. The hardness of Bitcoin's money is not a policy choice that can be reversed by a committee. It is an emergent property of a network that no single entity controls.

What Comes Next

The 20 millionth bitcoin was mined without ceremony because Bitcoin does not do ceremony. The protocol does not celebrate milestones. It simply continues producing blocks, adjusting difficulty, and following its emission schedule with the indifference of mathematics.

But for anyone paying attention, the milestone is worth pausing on. The supply curve is now in its steepest phase of deceleration. Each year that passes produces fewer new coins than the year before. Each lost wallet makes the remaining supply scarcer. Each halving tightens the flow further.

One million bitcoins remain to be mined. At current rates, half of those will be produced in the next six years. The other half will take more than a century. The window of abundant new supply is not just closing — it is, by any historical standard, already closed.

The 20 millionth coin was mined on a Monday. The network did not pause. The difficulty adjusted. The mempool cleared. And 450 new bitcoins entered circulation that day, as they will tomorrow, and the day after, each one slightly more scarce than the last.