Inheritance and the loss-of-keys reality

The coins that never come back

Most crypto education skips this lesson because it's uncomfortable. Here it is anyway: a meaningful fraction of all Bitcoin in existence is believed to be permanently lost. Different research groups have estimated this number, and the answers range, but the rough figure most often cited is around twenty percent — millions of bitcoins sitting in wallets nobody can access anymore. Forgotten passwords. Discarded hard drives. Owners who passed away without telling anyone where the keys were.

This is the rarely-discussed downside of self-custody. The same property that makes 'not your keys, not your coins' a feature — that nobody can take your coins — means that nobody can recover them, either. If you lose access and didn't plan for it, the coins are gone. The blockchain doesn't have a help desk.

Defense against forgetting yourself is the seed-storage lesson done well. A steel backup in a known location with at least one second copy somewhere else. Tested once a year by actually picking it up and confirming it reads. A backup you've never verified is a story you tell yourself.

Defense against the inheritance problem requires a separate plan. The basic version: a sealed letter held by a lawyer, or stored in a safe deposit box with named access, describing what crypto exists, where the seed backups are located, and how to reconstruct the wallet. Not the seed itself in any single document — that's a theft risk — but the location of the backups and the order of operations. The letter should be opened only on a defined event.

The advanced version uses multi-sig (lesson five) to make inheritance structural. A 2-of-3 wallet with one key held by you, one held in a separate location, and one held by a family member or attorney means an heir always has a workable two-key path forward without ever needing to find the deceased's hidden seed phrase. This is what professional crypto estate planning increasingly looks like.

Whatever design you choose, test it. A plan that has never been walked through is a plan that fails on the day you need it. Once a year, have the second person actually go through the recovery steps on a small amount. If they can't make it work, the plan needs fixing — now, while you're around to fix it.

Recap: crypto has no help desk. Plan for the forgetting case (tested backups) and the inheritance case (lawyer's letter or multi-sig with a co-signer). And test both while you're alive.