tradingdots

Wallets & Security

How to store crypto safely: what wallets and seed phrases are, hot vs cold and hardware vs software wallets, when to keep coins on an exchange, and how to avoid the scams that drain accounts.

This section explains crypto wallets and security: how to hold your own coins, back up access, and avoid the mistakes and scams that cause most losses. A crypto wallet does not store coins. It stores the private keys that prove you own coins recorded on the blockchain. Protecting those keys is the single most important part of owning crypto.

Start here

  1. What is a crypto wallet and how does it work?
  2. What is a seed phrase? 12 vs 24 words and safe storage.
  3. Hot wallet vs cold wallet.
  4. Hardware wallet vs software wallet.
  5. Crypto wallet vs exchange: where to keep your coins.
  6. Can you lose your Bitcoin? Nine common ways people do.
  7. Common crypto scams and how to spot them.

Key concepts

Custody

With custodial storage, such as an exchange account, a company holds the keys for you. With self-custody, you hold them. Self-custody removes the risk of an exchange failing or freezing withdrawals but makes you fully responsible for backups.

Seed phrases

A seed phrase (recovery phrase) is a list of 12 or 24 words that can restore your wallet on any compatible device. Anyone who sees it can take your funds. Store it offline, never type it into a website, and never share it with “support” staff.

Hot and cold storage

A hot wallet is connected to the internet, such as a phone app; it is convenient for small, frequent use. A cold wallet, usually a hardware device, keeps keys offline and suits larger long-term holdings.

Security checklist

  • Use unique passwords and app-based two-factor authentication, not SMS where possible.
  • Buy hardware wallets only from the manufacturer or an authorized seller.
  • Send a small test transaction before moving large amounts.
  • Treat unsolicited messages, giveaways and “guaranteed returns” as scams.

Crypto transactions are generally irreversible, so prevention is your only real protection. See the crypto hub for the wider basics.

Wallets & Security: frequently asked questions

What is the safest way to store crypto?

For larger long-term holdings, a hardware wallet bought from the manufacturer, with the seed phrase stored offline in a secure place, is widely considered the safest option. Small amounts for regular use can sit in a reputable software wallet or exchange. Spreading holdings reduces single points of failure.

What happens if I lose my seed phrase?

If you still have access to the wallet, create a new wallet immediately, write down its new phrase and move your funds. If you lose both the device and the phrase, the funds are usually unrecoverable. No company can reset a self-custody wallet for you.

Is it safe to keep crypto on an exchange?

It is convenient, and large regulated exchanges have security teams, but you depend on the company staying solvent and honest. Exchange failures such as FTX in 2022 left customers unable to withdraw. Many people keep only trading amounts on exchanges.

Can a hardware wallet be hacked?

Remote hacks are rare because keys stay offline, but risks include tampered devices, fake wallet apps and phishing that tricks you into revealing your seed phrase. Most losses come from user error and scams rather than the device itself.