A crypto wallet stores keys that control on-chain assets; it does not hold coins like a physical purse.
Wallets manage private keys or seed phrases that authorize transfers. Custodial wallets let an exchange hold keys; non-custodial wallets leave control with you.
In research workflows, Crypto wallet is usually interpreted with Private key, Seed phrase, Hot wallet, and Cold wallet rather than as a standalone signal. Operational security mistakes are irreversible on most public chains. Verify networks and destinations before large transfers.