What Happens to Cryptocurrency When the Owner Dies

Cryptocurrency is probably the digital asset where the most real money gets lost to poor planning. Unlike a bank account, or even a social media profile, there isn’t always a company you can ask for help. Everything depends on a technical distinction most people don’t learn about until it’s too late: who holds the keys.

The distinction that determines everything: self-custody vs. exchange custody

There are two fundamentally different ways to hold cryptocurrency, and they determine whether your family will be able to access it or not.

Self-custody. The account holder directly controls their private key, usually represented as a 12- or 24-word seed phrase, kept in a hardware wallet (like a Ledger or Trezor) or a software wallet. There’s no intermediary company — possession of the private key is ownership of the cryptocurrency. No one, not a company, not a court, not even the blockchain itself, can transfer those funds without that key.

Exchange custody. The account holder keeps their cryptocurrency in an account on a platform like Coinbase or Binance, which manages the private keys on their behalf. This works more like a bank: the exchange has a record of who owns what, and it can transfer funds to a verified heir, the same way a traditional bank would.

This difference is the single most important thing in cryptocurrency inheritance: on an exchange, there’s a human process for claiming the funds. In self-custody, there isn’t one.

Why a lost seed phrase means the money is gone

When someone keeps cryptocurrency in self-custody and dies without ever sharing the seed phrase with anyone, the result isn’t a complicated paperwork process — it’s a permanent, irreversible loss. There’s no “reset password,” no technical support, no authority that can override the cryptography. The blockchain doesn’t know or care that the owner died; it just keeps recognizing whoever holds the key as the owner.

This isn’t a hypothetical case. A Chainalysis analysis published in 2020 estimated that between 17% and 23% of all bitcoin that existed at the time — between 2.78 and 3.79 million coins — could be lost forever, based on addresses that hadn’t moved funds in years. That figure is worth treating with some nuance: it’s a statistical estimate, not a verified count, and it blends different causes of loss (deaths with no instructions left behind, forgotten passwords, hard drives mistakenly discarded, configuration errors). But even as a rough estimate, it illustrates the scale of the problem — a meaningful share of all cryptocurrency value is, in all likelihood, permanently out of reach.

Exchanges do have processes for heirs

If the cryptocurrency sits in an exchange account, the situation looks more like a digital bank account. Both Coinbase and Binance have documented processes for an heir to claim a deceased person’s funds:

Coinbase generally asks for estate documentation (such as letters testamentary, a court order for estate administration, or a small-estate affidavit depending on the state or country), a death certificate, and current government-issued ID for the person named in those documents. The process starts through a dedicated executor-services form in Coinbase’s help center.

Binance offers a feature called “Inheritance Appeal” inside the account’s self-service section, where heirs submit evidence connecting the deceased to the account (email, phone number, user ID, or account screenshots) along with death and kinship certificates. The full process typically takes one to two months, sometimes longer with multiple heirs or legal complications.

In both cases, the outcome isn’t direct access to the original account — it’s a transfer of the funds into a new account controlled by the verified heir.

Real options for planning cryptocurrency inheritance

If you hold cryptocurrency in self-custody, writing the seed phrase on a piece of paper in a drawer solves the access problem but creates a different one: anyone who finds that paper can empty the wallet in seconds, without waiting for anyone to die. That’s why it’s worth considering intermediate options:

• Multisig wallets. These configure a wallet so that multiple keys (for example, 2 of 3) are needed to authorize a transaction. Each key can be split among different trusted people, so no single person can move the funds alone, but several together can after the account holder dies.
• Seed splitting (Shamir’s Secret Sharing). This divides the seed phrase into several fragments, requiring a minimum number of them to reconstruct it. No single fragment reveals anything useful on its own.
• Encrypted instructions with conditional release. Storing the seed phrase or access instructions in an encrypted format that only releases to designated beneficiaries once death is confirmed, instead of leaving it accessible at any time. This is the approach Custodia — still in development — is built around: encrypted instructions assigned to specific beneficiaries, governed by release rules rather than standing access.
• “Dead man’s switch” services. Systems that release information only if the account holder stops periodically confirming they’re still alive (for example, failing to respond to an automated check-in within a set window).

None of these options replace a will or legal advice when significant amounts are at stake: a will can legally establish who inherits, but it doesn’t solve the technical access problem if the heir doesn’t have the key. The ideal approach combines both, alongside the rest of your digital inheritance planning: clear legal instructions plus a real technical mechanism for the key to reach the right person.

Frequently asked questions

Can exchanges like Coinbase or Binance transfer funds to the family? Yes, if the cryptocurrency was held in an exchange account. Both have formal processes requiring a death certificate and estate or inheritance documentation.

What happens if the cryptocurrency is in a self-custody wallet and no one has the seed phrase? It’s lost permanently. There’s no recovery mechanism if no one else knows the private key.

Is it true that millions of bitcoins have been lost forever? It’s an estimate: Chainalysis calculated in 2020 that between 2.78 and 3.79 million bitcoins could be lost, based on addresses inactive for years. The figure blends several causes and can’t be confirmed precisely.

Is a traditional will enough to inherit cryptocurrency? It can legally establish who inherits, but it doesn’t solve technical access in self-custody. It’s useful against an exchange, not against a wallet without the private key.