What is a crypto wallet?
A crypto wallet is an app or device that holds the keys that control your coins. The coins themselves stay on the blockchain. Whoever has the keys, or the seed phrase that backs them up, can move the funds, so protecting those keys is the whole job.
The short version
A crypto wallet does not "contain" coins the way a leather wallet holds cash. Your balance is a record on a public blockchain. The wallet holds a private key, a secret number that lets you sign transactions that move that balance. It also shows you a public address, which you share so people can send you crypto.
Most wallets back up all of their keys with a seed phrase (also called a recovery phrase): 12, 20 or 24 words. If your phone breaks, you type the words into a new wallet and your funds reappear, because they never left the blockchain.
What a wallet does
- Creates and stores keys, usually from a seed phrase.
- Shows addresses for receiving funds on each network.
- Signs transactions when you send, swap or use an app.
- Reads balances from the blockchain and shows them in one place.
- Connects to apps (exchanges, NFT markets, DeFi) and asks you to approve each request.
Many wallets also add in-app swaps, buying with a card, staking and price charts. These extras often carry fees; see wallet fees compared.
The main types of wallet
| Type | What it is | Examples we review | Good for |
|---|---|---|---|
| Mobile app | A wallet on your phone | Trust Wallet, Phantom, Keeper (formerly Tonkeeper) | Everyday use, small amounts |
| Browser extension | A wallet inside Chrome, Brave, Firefox or Edge | MetaMask, Rabby | Using DeFi and web apps |
| Desktop app | Software on your computer | Exodus, Electrum | Holding and managing coins at home |
| Hardware wallet | A small device that keeps keys offline and signs inside the device | Ledger, Trezor, Tangem | Savings and larger amounts |
| MPC / keyless | The key is split into shares held in different places, so there is no single seed phrase | Zengo, Binance Wallet (keyless mode) | People who fear losing a paper backup |
| Smart account / multisig | A smart contract wallet that can need several signatures | Safe | Teams, treasuries, shared funds |
Two more distinctions matter. Hot vs cold is about whether keys touch an internet-connected device (hot vs cold wallets). Custodial vs non-custodial is about who holds the keys: you, or a company such as an exchange (custodial vs non-custodial).
Addresses and networks
Each blockchain has its own address format. Bitcoin addresses often start with bc1, Ethereum and other EVM chains use 0x plus 40 characters, and TON addresses often start with UQ or EQ. One Ethereum-style address works on every EVM chain (Ethereum, BNB Chain, Base, Arbitrum, Polygon), but funds only exist on the network you sent them on. Always pick the same network on both sides. Our address checker tells you which network an address belongs to.
Where people actually lose money
Breaking the cryptography behind a properly generated key is not a realistic threat. Real losses come from people and software around the wallet:
- Seed phrase theft: fake support agents, fake "validation" letters and phishing sites. Ledger and Trezor customers received scam letters by post in 2025 and February 2026 asking them to scan a QR code and enter their recovery phrase (BleepingComputer, Feb 2026).
- Fake apps: a fake Ledger app on Apple's Mac App Store collected recovery phrases between 7 and 13 April 2026 and about $9.5M was drained (iThinkDiff, Apr 2026). See fake wallet apps.
- Malicious signatures: drainer sites trick you into approving token access. See wallet drainers and token approvals.
- Copy-paste mistakes: look-alike addresses planted in your history. A trader sent about $50M in USDT to a poisoned address on 20 December 2025 (The Block, Dec 2025). See address poisoning.
- Supply-chain attacks: a malicious Trust Wallet Chrome extension version (2.68) drained about $7M from 2,596 wallets in December 2025, according to Trust Wallet (BleepingComputer, Dec 2025).
Our security incident tracker lists dated cases across all major wallets.
Five rules that prevent most losses
- Never type your seed phrase into a website, form or chat, and never share it with "support". No real company will ask for it.
- Install wallets only from the official site (type the address yourself or use a bookmark) or the official app-store listing.
- Write the seed phrase on paper or metal, keep it offline, and never photograph it.
- Read every signature request. If you don't understand it, reject it.
- Keep larger amounts on a hardware wallet and use a separate hot wallet for daily activity.
Ready to pick one? Read how to choose a crypto wallet or try the wallet finder.
Frequently asked questions
Does a crypto wallet store my coins?
No. Coins are records on a blockchain. The wallet stores the private keys that let you move them, and the seed phrase backs those keys up.
Is a crypto wallet the same as an exchange account?
No. An exchange account is custodial: the exchange holds the keys. A self-custody wallet gives you the keys and the responsibility that comes with them.
Can I have more than one wallet?
Yes, and many people do: a hardware wallet for savings and a mobile or browser wallet for small, everyday amounts. You can also restore the same seed phrase in compatible wallets.
What happens if I lose my phone?
If you have your seed phrase, install the wallet on a new device and restore it; your funds are still on the blockchain. Without the seed phrase or another recovery method, a self-custody wallet cannot be recovered.
Are crypto wallets free?
Most software wallets are free to download. You pay network fees when you send, and in-app swaps, bridges and card purchases usually add their own fees. Hardware wallets cost money up front.