“Crypto card” describes a payment experience, not one custody model. Two cards can look similar at checkout while giving their providers very different control over the funds behind a transaction.
Three common operating models
In a custodial model, a provider controls the account infrastructure and records your balance. In a self-custody-oriented model, assets remain associated with a wallet you control until a spending mechanism is triggered. Hybrid designs may use a self-custody wallet alongside smart-contract permissions, prefunding, or a separate settlement balance.
Labels alone are not enough. Ask what must be deposited, approved, or converted before a payment and whether revoking a permission stops future spending.
What changes for the cardholder
- Recovery: a provider may offer account recovery; a self-custody wallet requires a secure recovery plan.
- Counterparty exposure: funds held by an intermediary depend on its operations and legal structure.
- Smart-contract exposure: contract-based spending adds permission and software risk.
- Convenience: prefunded fiat can be simpler at checkout, while wallet-linked designs may reduce manual transfers.
- Disputes: card purchase protections and blockchain transaction finality are different layers.
A custody checklist
Identify the wallet or account that holds value, the entity that can freeze card access, the asset used for settlement, and the exact moment conversion occurs. Review allowance controls, recovery instructions, cardholder terms, and what happens if the app or card programme becomes unavailable.
Self-custody can reduce one kind of dependency while increasing the cardholder’s responsibility for keys and permissions.
Evidence log