What Is a Crypto Wallet?

A crypto wallet is a tool that stores the private keys needed to access and manage assets on a blockchain. It does not hold tokens directly — the tokens exist on-chain — but without the private key, you cannot authorize transactions.

How Wallets Work

A wallet generates a public address (like a bank account number) and a private key (like a PIN). The public address is where you receive funds. The private key signs transactions to authorize sending. Anyone who has your private key has full control of your assets. Most wallets also give you a seed phrase — a series of 12 or 24 words that can regenerate the private key if you lose access to the device.

Custodial vs Non-Custodial

A custodial wallet is one managed by a third party, typically a CEX like Coinbase or Binance. The exchange holds the private keys, and you log in with a username and password. A non-custodial wallet gives you full control of your keys. If the exchange holding your funds fails, you lose access. With a non-custodial wallet, only you control the keys — and only you are responsible for keeping the seed phrase safe.

Types of Wallets

Hot wallets are connected to the internet, making them convenient for frequent use but more exposed to hacks. Cold wallets (hardware wallets) store keys offline and are much harder to compromise but less convenient. On Solana, the most common hot wallets are Phantom and Solflare. Hardware wallets like Ledger work across multiple chains.