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Lost Bitcoin

Coins That Never Came Back

A significant portion of issued bitcoin technically still exists but is likely never to move again. This estimate cannot be measured precisely, and the range varies widely depending on the assumptions used.

Figure 0 — Estimated lost supply breakdown

Share of mined, circulating, and estimated-lost supply against the 21 million BTC cap, with a breakdown of the lost-coin estimate. All figures are on-chain analysis estimates.

Total Supply Cap
21,000,000BTC
Mined So Far
19.9M94.7%
Est. Permanently Lost
3.8M≈ 18%
Est. Circulating
16.1M≈ 77%

Breakdown of the 21M Supply (based on 21M total cap)

estimate · Chainalysis / Glassnode
76.7%
18.1%
5.2%
Circulating76.7%
LOST18.1%
Unmined5.2%

The supply cap is 21 million, but about a fifth of it will effectively never return to the market — the 'Lost Bitcoin' phenomenon that substantively reinforces scarcity.

Breakdown of Permanently Lost Estimate (based on 3.8M lost)

total ≈ 3.8M BTC · shares below are relative to the lost amount (3.8M)
  • Satoshi's wallet
    1,100K BTC28.9%
  • Lost private keys
    1,500K BTC39.5%
  • Early mining dormant wallets
    900K BTC23.7%
  • Unrecovered exchange hacks
    200K BTC5.3%
  • Burned · dust · other
    100K BTC2.6%

The % on each card below is relative to the 21M BTC total supply cap

Satoshi's Wallet

≈ 5.2%
≈ 1,100,000 BTC

Holdings of the early miner (Satoshi) estimated via Patoshi pattern analysis. Untouched since 2009–2010.

Lost Private Keys

≈ 7.1%
≈ 1,500,000 BTC

Discarded hard drives, lost notes, forgotten seed phrases. The UK's James Howells and his landfilled 7,500 BTC are a famous case.

Early Mining — Dormant Wallets

≈ 4.3%
≈ 900,000 BTC

P2PK addresses mined between 2009–2011 that haven't moved in over a decade. Many are believed to have lost keys.

Unrecovered Exchange Hacks

≈ 1.0%
≈ 200,000 BTC

Unrecovered Mt. Gox funds, the 2016 Bitfinex hack, and other coins frozen or untraceable after hacks.

Burned · Dust · Other

≈ 0.5%
≈ 100,000 BTC

An estimate combining unverifiable burn addresses (e.g. 1BitcoinEater…, ~3,700 BTC confirmed), dust UTXOs worth less than fees, OP_RETURN outputs, and other economically unrecoverable remainders.

'Lost coins' is an estimate, not a measurement

The blockchain shows how much is in an address, but it does not reveal who holds — or has lost — the private key to that address. All estimates of lost coins are therefore based on the indirect evidence that a given address 'hasn't moved in a long time.'

The commonly used threshold is a UTXO with no movement for 7 or 10-plus years. Calculating on that basis yields a range of roughly 3 to 4 million BTC, but this mixes in coins that are simply held long-term by owners who still have their keys. In fact, several cases are reported each year of wallets that had been dormant for over a decade suddenly moving.

Accordingly, the roughly 3.8 million BTC figure shown on this site should be understood as a midpoint estimate between an upper and lower bound. Different organizations put forward figures ranging from 2.5 million to 4.5 million BTC, and neither end is verifiable.

Major categories of lost coins

The largest single item is the early mined supply believed to belong to Satoshi Nakamoto. Based on analysis of the so-called Patoshi pattern, it is estimated at around 1 million BTC, and it has never moved even once since 2010. If this supply were ever to move, the event of 'Satoshi's identity' being revealed would likely cause a bigger shock than the market impact itself.

Lost private keys are concentrated among early users. Most cases involve discarding a hard drive or failing to back up a wallet file back when bitcoin had almost no value. The most widely known case is James Howells' 7,500 BTC, whose hard drive is buried in a landfill in Newport, UK.

Beyond these, early P2PK addresses mined between 2009 and 2011, unrecovered funds from hacks such as Mt. Gox and Bitfinex, verified burn addresses, and dust UTXOs whose recovery cost exceeds their balance are all included in lost coin estimates.

What lost coins mean for supply

Lost coins effectively lower the actual supply ceiling. This is the basis for the calculation that, instead of the nominal cap of 21 million, actually circulating supply is likely somewhere around 17–18 million.

However, this effect occurred long ago and is already reflected in market prices. Lost coins are less a growing variable than a fixed background condition. The rate at which new coins are lost has slowed considerably compared to the early years, as wallet management practices have improved.

Sources & references