Crypto

Why crypto is the hardest thing to inherit

Self-custody removes the intermediary that inheritance law depends on. Here is what that means for a family, and what actually works.

8 min read · Reep Tech Ltd

Every other asset class has an intermediary. A bank has a death claims department. A registrar can transfer shares. A pension trustee has a process, a form and a legal duty to follow it. Self-custodied crypto has none of that, by design, and that design is the whole reason people chose it.

The consequence is blunt. If nobody else can reconstruct the seed phrase, the balance stays visible on-chain and unreachable forever. It is not frozen, disputed or held in escrow. It is simply gone, while a block explorer continues to display it to anyone who cares to look.

Why the obvious solutions fail

Most people try one of four things, and each fails in a specific, predictable way.

• Write it down and hide it. Fire, flood, house moves and a helpful relative clearing a drawer all beat this method. So does anyone who finds it while you are still alive.
• Put it in the will. In many jurisdictions a will becomes a public record once it enters probate. Publishing a seed phrase is the opposite of the intended outcome.
• Tell one trusted person. This converts a technical risk into a social one. It also fails silently if that person predeceases you, falls out with the family, or forgets which of your three notebooks it was.
• Leave it in the password manager. A vault your heirs cannot legally or practically unlock is not an inheritance plan. Emergency access features help, but most are all-or-nothing and time-based rather than event-based.

What the problem actually is

Strip away the specifics and crypto inheritance is two problems wearing one coat. The first is custody: how a secret survives you without being exposed while you live. The second is timing: how anyone knows the moment has come, without taking someone's word for it.

Solve custody without timing and you have a hidden secret nobody can use. Solve timing without custody and you have a countdown to a leak.

Splitting the secret handles the first half. Shamir-style schemes let a phrase be divided so that any two of three fragments reconstruct it and any one alone reveals nothing. A single compromised holder is not a breach, and a single unavailable holder is not a dead end.

The second half cannot be solved with cryptography, because it is a question about the world rather than about mathematics. It needs people who know you, a mechanism that notices your absence, and a record that can be checked. That is what a verification layer is for, and why we treat it as a separate system rather than a setting.

What a workable plan looks like

The version that survives contact with reality has four properties. The secret is never whole in one place. No single person can act alone. Absence is detected rather than announced. And the recipient gets instructions, not just data, because handing a grieving twenty-two-year-old a seed phrase with no context is its own kind of failure.

Everything else is detail. But those four are not optional, and any plan missing one of them will fail in the specific way that missing piece predicts.