What is Crypto wallet?

How it works

When people say "my wallet has 1 ETH" they really mean the blockchain says address 0xABC... holds 1 ETH, and their wallet has the private key that proves they own that address. Move the keys to a new wallet and the funds appear there immediately — they never actually moved on the chain, only the controlling key did.

Wallets fall into three rough buckets:

• Custodial wallets — an exchange or service holds the keys for you (Coinbase, Robinhood, Cash App). Easy onboarding, but you don't actually control the assets — the platform does.
• Software wallets — apps and browser extensions like MetaMask, Phantom, or Rabby. The keys live on your phone or laptop, encrypted by a password. Convenient for daily use.
• Hardware wallets — physical devices like Ledger or Trezor that keep the keys offline. The phone or laptop signs transactions through the device but never sees the key directly.

Example

You install MetaMask, write down the 12-word seed phrase it generates, and use it to interact with a DEX. Six months later your laptop dies. You install MetaMask on a new machine, type the seed phrase in, and the same accounts and balances appear — because the seed phrase deterministically recreates the same private keys.

Why it matters

The phrase "not your keys, not your coins" comes from the fact that custodial wallets are essentially IOUs. If the platform freezes withdrawals (FTX, Celsius, Voyager all did), the assets are stuck. Self-custody — software or hardware — eliminates that counterparty risk in exchange for accepting full responsibility for backups and security.

Pick the wallet type based on the amount and how often you transact. A few hundred dollars of pocket-money crypto can sit safely in a software wallet; a five-figure long-term position belongs on a hardware wallet stored somewhere a thief can't easily find.