Hot wallet or cold wallet? What's the difference, and which do you need

Once you decide to hold your own Bitcoin, the next question is where. You'll hear two words again and again: hot and cold. This guide explains what they mean, what each is good for, and how most people use both.

First: what a wallet really holds

A Bitcoin wallet doesn't actually hold coins. Your Bitcoin lives on the Bitcoin network. What the wallet holds is your private keys: the secret that lets you spend that Bitcoin.

So the real question is never "where are my coins?" It's "where are my keys, and who can reach them?"

• If an exchange holds the keys, the exchange controls your Bitcoin.
• If you hold the keys, you control it. You're also responsible for keeping them safe.

Hot and cold are two ways of holding your own keys.

Hot wallet: keys on a device that's online

A hot wallet is an app on your phone or computer. The keys are stored on that device, and the device is connected to the internet.

Good for:

• small amounts you spend or move often;
• quick payments and receiving Bitcoin on the go;
• getting started. Most are free.

The risk:

• the device is online, so malware, a fake app or a phishing link can reach the keys;
• if your phone is stolen or broken and you have no backup, the Bitcoin is gone.

Think of it like the cash in your pocket. Handy, but you wouldn't carry your savings around.

Cold wallet: keys kept offline

A cold wallet keeps the keys on something that never connects to the internet. Usually that's a hardware wallet: a small, dedicated device. When you want to send Bitcoin, the device signs the payment itself, so the keys never leave it.

Good for:

• savings you don't touch often;
• larger amounts;
• peace of mind when exchanges or apps have problems.

The trade-off:

• a few extra steps every time you send;
• you usually have to buy the device;
• you still need a safe backup. If you lose both the device and the backup, the Bitcoin is gone.

Think of it like a safe at home. A little slower to open, much harder to break into.

Side by side

The simple setup most people use: both

You don't have to choose one. A common setup is:

1. Cold wallet for savings. Most of your Bitcoin, rarely moved.
2. Hot wallet for spending. Only what you'd be comfortable carrying in your pocket.
3. When the hot wallet runs low, top it up from the cold wallet.

If the phone is lost or hacked, only the small amount is at risk. The savings stay safe.

What to look for in a hardware wallet

If you decide to buy one, look for:

• The amount and address shown on the device's own screen before you approve a payment. That screen is the one you can trust, even if your computer is infected.
• Keys created on the device, never imported from a website or typed into a computer.
• A clear backup, and instructions you understand before you need them.
• Signed updates from the maker only.
• Bought from the maker or an authorised seller. Never second-hand, never from a marketplace listing. The box should be sealed.

Common questions

Is a hot wallet unsafe? No. It's fine for small amounts if you keep your phone updated, install wallets only from the official app store and back up your recovery words. It's just not the place for your savings.

Can a cold wallet be hacked? Nothing is perfect, but a well-made device that stays offline removes the most common online attacks. The bigger real-world risks are losing the backup or being tricked into giving it away.

What if the hardware wallet breaks or the company disappears? Your Bitcoin isn't inside the device. With your backup, you can restore your keys on another compatible wallet. That's why the backup matters more than the device.

Is a paper wallet a cold wallet? Writing keys on paper keeps them offline, but paper wallets are easy to get wrong, and spending from them safely is tricky. For beginners, a hardware wallet is simpler and safer.

Quick checklist

• ☐ I know where my keys are and who can reach them
• ☐ Savings in a cold wallet, everyday money in a hot wallet
• ☐ Backup written on paper or the card provided, never online
• ☐ Hardware wallet bought from the maker or an authorised seller
• ☐ I check the amount and address on the device screen before approving

We will never ask for your recovery words, your backup or your password. Nobody genuine ever will.

This guide is general information about keeping your own Bitcoin safe. It is not financial or investment advice, and we don't tell anyone whether to buy or sell.