TL;DR
The custody spectrum from exchange-held funds through seed-phrase wallets to MPC and multisig.
In one block
Custody answers who can authorise a transfer and who can restore access when devices, credentials, or people are unavailable. A custodian signs on a client’s behalf; self-custody keeps signing authority with the user; multisig and MPC distribute authority across participants.
What is crypto custody?
Quick answer
Custody answers who can authorise a transfer and who can restore access when devices, credentials, or people are unavailable.
Custody answers who can authorise a transfer and who can restore access when devices, credentials, or people are unavailable.
The useful way to understand crypto custody is to separate the underlying system from the apps and services built around it. The system follows technical rules; a service may add custody, recovery, fees, limits, or human support on top.
That distinction matters because two products can use the same network while exposing users to very different operational and security trade-offs.
How crypto custody works
Quick answer
A custodian signs on a client’s behalf; self-custody keeps signing authority with the user; multisig and MPC distribute authority across participants.
A custodian signs on a client’s behalf; self-custody keeps signing authority with the user; multisig and MPC distribute authority across participants.
A wallet prepares an instruction, the user or an authorised policy signs it, and the relevant network or service validates that instruction against its rules. A successful interface message is not the same as final settlement.
Fees, confirmation time, and reversibility depend on the network and product. Always verify the asset, address, chain, amount, and contract interaction before signing.
Risks and failure modes
Quick answer
A single custodian can fail, while self-custody can fail through lost backups or coercion. Distributed systems can fail through poor coordination.
A single custodian can fail, while self-custody can fail through lost backups or coercion. Distributed systems can fail through poor coordination.
The biggest losses usually come from a combination of technical complexity and rushed human decisions: copied addresses, malicious approvals, weak account recovery, fake support, or concentration in a single provider.
Risk cannot be eliminated, but it can be made visible. Prefer small test transactions, independent verification, strong authentication, and a written recovery plan.
A practical crypto custody checklist
Quick answer
Choose custody by threat model, value, recovery needs, and operating skill—not by slogans about convenience or control.
Choose custody by threat model, value, recovery needs, and operating skill—not by slogans about convenience or control.
Document the network, wallet, recovery method, trusted contacts, and any service that can move or freeze funds. Review permissions regularly and remove access that is no longer needed.
Keep operational funds separate from long-term holdings. The simplest secure setup is the one you can test, explain, and recover without improvising under pressure.
Knowledge check
Which statement best reflects safe use of crypto custody?
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