Lately, more and more people have been asking me about cold wallets, and honestly, it's a topic worth discussing thoroughly. I’ve noticed that many people don’t really understand the difference between cold wallets and hot wallets, or even which one they should use.

To start with the most straightforward explanation: a cold wallet is a way to store your crypto assets completely offline. No internet connection means hackers basically can’t attack you remotely, which is its biggest advantage. I’ve seen quite a few cases where assets were stolen, and almost all of them were due to poor security habits with hot wallets.

There are several forms of cold wallets. The most common is the hardware wallet, which is a device shaped like a USB stick, such as brands like Ledger. Usually, you need to enter a PIN to unlock it. Then there are paper wallets, which involve printing your private key on paper; they’re cheap but risky because paper can be damaged or lost. There are also more advanced methods, like recording the private key as an audio file or storing parts of it in different safes, but these are typically used only by institutions or very cautious individuals.

Ultimately, whether to choose a cold wallet depends on your situation. If you hold a large amount of crypto assets or don’t plan to trade frequently, investing in a cold wallet is definitely worthwhile. Most long-term holders I know use cold wallets. Conversely, if you’re a short-term trader who trades often, the convenience of a hot wallet might be more important.

I have to admit, cold wallets also have their downsides. They usually cost between $79 and $255, which is much more expensive than free hot wallets. Also, every time you use them, you need to enter a password, making the transaction process more cumbersome. But if you truly care about asset security, these inconveniences are worth it.

The reason cold wallets are safer is mainly because the private key never touches the internet. When you make a transaction, the signing process is done entirely offline, so even if a hacker intercepts the transaction, they can’t get the private key. I’ve read some technical articles explaining this principle, which use the concept of offline software wallets—splitting the wallet into two parts: one that stores the private key offline, and another that holds the public key online. The transaction is signed offline before being uploaded.

However, I want to remind you that no matter how secure a cold wallet is, it’s not foolproof. You need to take good care of it and avoid losing or damaging it. Choosing a reputable manufacturer is also very important. I saw a report from Forbes mentioning that, after incidents like FTX, more investors are valuing self-custody, and cold wallets have become a popular choice for many.

Honestly, if your crypto assets are large enough to make you worried, don’t hesitate—get a cold wallet. In the long run, security is definitely more important than convenience. Many assets on Gate are worth holding long-term, and storing them in a cold wallet will give you peace of mind.