Image: "Inheritance - Last Will & Testament" by advokatsmart.no, licensed under CC BY 2.0.
A bank account has a beneficiary. A brokerage has a transfer-on-death form. Your seed phrase has neither. If the only person who knows how to open your wallet is you, then your crypto is one accident away from being frozen forever - not stolen, just unreachable.
This is the quiet problem underneath the whole self-custody pitch. "Be your own bank" sounds great right up until the day someone else needs to make a withdrawal. And the numbers say a lot of people never planned for that day.
Why crypto is uniquely easy to lose forever
Traditional assets sit inside institutions. A bank, a broker or an insurer holds the account, and the law gives your executor a path to it: a death certificate, a court order, a beneficiary form. There is always a human on the other end who can be compelled to act.
Self-custodied crypto removes that human. Control lives in a private key, and whoever holds the key holds the coins - full stop. There is no reset link, no security-question backup, no fraud department. Lose the key and no court on earth can move the funds. Casa CEO Nick Neuman put the strangeness plainly: crypto, he said, is "the only major asset class in the world that works like that."
On-chain analysts reach the lost-coin figure by watching for UTXOs that have not moved in five years or more, then refining with clustering models. Firms including Chainalysis and Glassnode land in the 2.3-to-3.8 million BTC range, and some studies push higher. A meaningful slice of that is not carelessness - it is owners who died with airtight security and no plan.
The trap of writing keys into your will
The instinct is to write the seed phrase straight into the will and be done with it. Do not. A will that goes through probate becomes a public court record. Anyone - a clerk, a relative, a stranger reading filings - could copy those twelve words and empty the wallet long before your heirs see a cent.
A safer pattern separates the instructions from the secrets. The will names the assets and points to where access lives; the keys themselves sit somewhere private and controlled - a sealed hardware device, a bank safe-deposit box, a lawyer's vault, or a service built for exactly this handoff.
Your real options, ranked by effort
Hardware wallet inheritance kit
Store the device and a written recovery sheet in a sealed, dated envelope inside a safe or bank box. Leave a plain-letter guide for a non-technical heir. Cheapest route, but it leans entirely on physical security and your own discipline.
Multisig (2-of-3)
Split control across three keys and require any two to spend. Keep one, give one to your spouse, hand one to a lawyer or a custody service. No single person can drain the wallet, and heirs reconstruct access when the right cosigners cooperate.
Casa & Unchained
Casa's inheritance product (about $250/year) sits on a 2-of-3 multisig and lets a named recipient claim funds through a friendly app - no hardware skills required - only after you pass. It supports BTC, ETH, USDT and USDC. Unchained offers a comparable collaborative-custody path.
Dead-man's-switch tools
Services such as Sarcophagus encrypt your instructions and release them to a chosen recipient if you stop checking in. Powerful and non-custodial, but complex, thinly used, and legally untested in most places - a supplement, not a sole plan.
Coinbase & other exchanges
Coinbase offers no beneficiary or transfer-on-death setting; accounts pass through the estate and usually through probate, with a death certificate, court paperwork and a medallion signature guarantee for large transfers. River is a rare exchange that supports a transfer-on-death designation.
Keys inside the will
Never place a seed phrase or private key in a document headed for probate. Reference where access lives instead, and keep the secret itself off any public record.
How much Bitcoin is already gone?
Estimates of permanently lost BTC, by source, in millions of coins.
The tax and probate angle heirs will thank you for
Here is the part most people miss. When someone inherits crypto, the cost basis usually steps up to the coin's fair market value on the date of death. If you bought Bitcoin at $2,000 and it is worth $110,000 when you pass, your heir's basis resets to that higher number. Years of embedded gains can evaporate for tax purposes - the same treatment inherited stocks get, and one of the friendlier rules in the code.
The estate side needs watching in 2026. The lifetime estate and gift tax exemption is set to fall back toward roughly $7 million per person, down sharply from recent highs. For families with large crypto holdings, more of the estate could face a top federal rate near 40%. Big balances are worth a conversation with an estate attorney who actually understands digital assets - and access still matters more than any form, because a stepped-up basis on coins nobody can open is worth nothing.
A quick reality check
Two well-known cautionary tales: Ripple investor Matthew Mellon died in 2018 with a fortune reported near half a billion dollars in XRP that heirs struggled to reach, and early Bitcoin miner Matthew Moody died in 2013 with coins his family could not recover. Neither lost the money to a hacker. They lost it to the absence of a plan.
Your step-by-step recoverability plan
You do not need to be technical to fix this in an afternoon. Tap each item as you finish it.
The crypto inheritance checklist
Click a line to mark it done.
- Write a full inventory of every wallet, exchange and asset - without secrets in it.
- Decide your model: sealed hardware kit, 2-of-3 multisig, or a service like Casa or Unchained.
- Store seed phrases off any document that could enter probate.
- Name where access lives in your will or trust - point to it, do not print it.
- Write a plain-language guide a non-technical heir could follow step by step.
- Tell one trusted person that a plan exists and how to start it.
- Check exchange rules - set a transfer-on-death option where one exists.
- Review it once a year and after any big move between wallets.
Crypto handed the average person a power banks spent a century guarding: total control of your own money. That power comes with a matching responsibility - being the only failure point in the system. A weekend of planning is the difference between coins that become a legacy and coins that become another entry in the lost-forever column. Set it up now, tell someone it exists, and let your heirs inherit the wealth instead of the mystery.
This article is general information, not legal, tax or financial advice. Talk to a qualified professional about your own situation. More background from Coinbase's guide to passing on crypto.