What is a crypto wallet?
A crypto wallet doesn't store cryptocurrencies — it stores private keys that prove ownership of addresses on the blockchain. The cryptocurrency always stays on the blockchain; the wallet just gives you access to it.
Custodial vs Non-custodial
Custodial wallet: a third party (exchange) holds the private keys on your behalf. Binance and OKX are custodial — convenient, but it means "not your keys, not your crypto." If the exchange collapses (like FTX in 2022), you may lose access to your funds.
Non-custodial wallet: you alone hold the private keys. MetaMask, Trust Wallet, Phantom (Solana). Full control — but full responsibility. Lose your seed phrase, lose everything.
Hot wallet (online)
- MetaMask — most popular Ethereum/EVM wallet. Browser extension + mobile app.
- Trust Wallet — multi-chain, mobile, Binance ecosystem.
- Phantom — Solana ecosystem, also supports ETH/BTC.
- OKX Wallet — built into OKX app, multi-chain Web3.
Cold wallet (offline)
Hardware wallets store private keys on a physical device that never goes online when signing transactions. The most secure option for larger amounts.
- Ledger Nano X — most popular hardware wallet, Bluetooth, 5,500+ tokens
- Trezor Model T — open-source firmware, touch screen
- Coldcard — Bitcoin-only, air-gapped, for advanced users
Seed phrase — the golden rule
The seed phrase (12 or 24 words) is the master key that can restore any wallet. Write it on paper or a metal plate — never digitally. Never enter it online. Keep a copy with a trusted person in a sealed envelope.
Which wallet to use?
- Beginner: leave funds on Binance/OKX until you learn the basics
- For DeFi and Web3: MetaMask or Trust Wallet
- For amounts >€500: Ledger or Trezor — mandatory
- For Solana: Phantom wallet