Lost and sleeping coins

A bitcoin is lost when nobody has the key that can move it anymore. The chain can't see that. What it can show is how long coins have sat without moving, and by that measure millions of bitcoin have been asleep for years.

How long coins have sat still

The age of every unspent piece of bitcoin was checked at block 972,307, on 20 October 2026. Age here means the time since the coins last moved. 64% of all bitcoin had not moved for a year or more, and much of it far longer:

Not moved for	Bitcoin	Share of all bitcoin
5 years or more	6.8 million	34%
10 years or more	3.59 million	18%

Another 1.72 million bitcoin sit in outputs with no address at all. Much of that is in the pay-to-public-key form that early miners received in 2009 and 2010.

Asleep is not the same as lost

Coins sit still for many reasons. Some owners hold for a decade on purpose, exchanges and funds keep reserves in cold storage, and some coins wait in an estate for a court. Others really are gone: keys on a hard drive that was thrown away, backup words that were never written down, an owner who died without telling anyone. The record looks the same in every case, which is why estimates of truly lost bitcoin vary so widely.

A few coins are lost for certain. The 50 bitcoin of the very first block can never be spent, and coins sent to addresses nobody is known to control, like the one in how many bitcoin there are, are treated as destroyed.

Satoshi's coins

Many coins mined in Bitcoin's first year are widely believed to be Satoshi's, and most have never moved. Whether the keys still exist is unknown.

When old coins wake up

Now and then coins untouched for ten years or more move, and it makes the news. The chain shows that the keys were used and where the coins went. It doesn't show who used them or why: an owner moving to a newer kind of address, an estate being settled, a sale, or something else. Headlines that say why are usually guesses.

Found an old wallet, or locked out of one?

• Make copies first. Copy an old hard drive or wallet file before trying anything, and work on the copy.
• Look up an address if you have one. Any block explorer shows whether it still holds coins, without needing the keys.
• An old wallet file usually needs the software that made it, or a compatible wallet, plus its password if it had one.
• A forgotten hardware PIN usually means resetting the device after a few wrong tries, then restoring it from the backup words.
• Never upload a wallet file or type its words into a website, and never send them to someone offering to unlock it. That is how found coins get stolen.

Can lost coins be recovered?

No. Without the key, or the backup words that recreate it, nobody can move the coins, and nobody can reissue them. Anyone who offers, for a fee, to recover coins whose keys are gone, or to reverse a theft, is very likely running a scam. Keeping your own backup words is the only protection: see seed phrases and backups and if something happens to you.