What Is a Hot Wallet and a Cold Wallet

A hot wallet is connected to the internet: a phone app, a browser extension, an exchange account. A cold wallet keeps your keys offline: a hardware device or a piece of paper with the words written on it. The difference is how exposed your keys are to an attack over the network.

Hot wallet

Convenient for regular use: send quickly, receive, exchange. The internet connection makes it vulnerable. Malware, a phishing site, or a vulnerability in the app could theoretically reach the keys. Use it for amounts you are actively working with.

Cold wallet

The keys never touch the internet. A hardware wallet looks like a USB drive. You sign a transaction on the device itself, and what goes out to the network is the completed signature, not the keys. A paper wallet is simply a printed address and private key with no electronics at all. Use it for larger amounts you do not need to touch every day.

How people use both together

A common setup for anyone holding serious amounts: main funds on a cold wallet, a small working balance on a hot wallet. That is a sensible trade-off between security and convenience.

An exchange account is also a hot wallet

The difference is that the exchange holds the keys, not you. The upside is convenience. The downside is that the keys are not yours and you depend entirely on the security of that platform.

Simple rule

Sending and receiving often: hot wallet. Storing a large amount long-term: cold wallet.