What Is a Crypto Wallet? Public Keys, Private Keys and Addresses
Published · GetBestWallet editorial
Understand what a wallet actually stores, what you can share, and which secrets control your funds.
Key takeaway
A wallet manages access to blockchain accounts; it does not store coins as files. Share a receiving address and network when needed, but keep private keys and recovery material secret.
Your assets are recorded on a network
A cryptocurrency wallet is an interface for accounts on a blockchain. It helps you view balances, construct transactions and authorize actions. Coins are not files inside your phone. Deleting an app does not delete the network records, but losing the credentials needed to control an account can make its assets inaccessible.
Address, public key and private key
A receiving address identifies a destination on a particular network. It is generally shareable, although publishing it can expose transaction history and relationships. A public key is used in signature verification; an address may be derived from it, but the two are not interchangeable on every network. A private key authorizes actions for an account. Anyone who obtains it may be able to move that account’s assets.
What a recovery phrase does
Many self-custody wallets derive keys from a recovery phrase. One phrase can therefore control multiple accounts and assets across supported networks. It is not a customer-service code. Never give it to support staff or enter it in a website to verify your wallet. Not every wallet uses this model: custodial services, smart accounts and passkey-based products can have different recovery arrangements.
A practical receiving example
Suppose a friend wants to send you USDC. Share the receiving address and the exact supported network, not a screenshot of your backup. Confirm that both sides mean the same asset on the same chain. An identical-looking address on two EVM networks does not make the networks interchangeable. If a service supplies a destination tag or memo, pass that information along too.
Before using a wallet
Identify who controls the signing credentials, how recovery works and which networks the product supports. Practice with a small amount before storing more. Record public information separately from recovery secrets. If an account looks empty after restoration, verify the network and account selection before assuming the assets are gone. Avoid sharing balances or addresses publicly unless you understand the privacy consequences.