Recently, many friends around me have been asking me the same question: how can I safely store my own crypto assets? Especially coins that are held long term—people truly don’t want to lose them due to improper management. In fact, this question points to a core need: finding a reliable cold wallet.

I’ve noticed that many people still have a somewhat vague understanding of cold wallets. Simply put, a cold wallet stores your private keys on an offline device—typically items like hardware wallets, paper wallets, or USB wallets. The biggest difference from a hot wallet (i.e., a mobile app wallet or a computer wallet) is right here—one is offline, the other is online. “Offline” means hackers have a hard time launching remote attacks, which is also why cold wallets are generally more secure.

The working logic of a cold wallet is actually not complicated. First, it uses encryption algorithms to generate a pair of public and private keys. The public key is like your account address; it can be openly shared at will to receive coins. The private key is the real key of authority—once you have it, you can move all the assets in the wallet. There’s also something called a seed phrase, usually 12 or 24 English words; in essence, it’s another representation of the private key, making it easier to remember. Then, the cold wallet stores these private keys on a physically isolated device, effectively preventing hackers from breaking in.

When it comes to choosing a cold wallet, I think it mainly depends on four dimensions. Security is obviously the top priority—you should look for products with strong encryption algorithms and multi-factor authentication. Compatibility is also crucial—you need to make sure it supports the coins you hold. On the cost side, cold wallets are priced from dozens to a few hundred dollars, depending on whether they’re worth the money. Finally, there’s user experience—wallets with a friendly interface feel more comfortable to use, and managing assets is also easier.

Among the more popular hardware wallets on the market, let me briefly introduce a few. Ledger Nano X, made by the French company Ledger, supports more than 5,500 cryptocurrencies, with a security level of CC EAL 5, priced at $149. Trezor Safe 5, from SatoshiLabs in the Czech Republic, supports more than 1,000 coins, with a security level as high as CC EAL 6+, priced at $169. There’s also SafePal S1 Pro—this one supports more than 30,000 cryptocurrencies, with the most budget-friendly price at about $90.

In practice, using a cold wallet is straightforward. If you don’t have a public/private key pair, generate one first via the cold wallet or a hot wallet. When making a transaction, connect the cold wallet to your phone or computer, enter your PIN to unlock, and initiate the transaction. Then verify and confirm on the device. After the transaction is completed, disconnect, and the private key returns to an offline state. One thing to remind you: never connect to an unknown DApp, otherwise the advantages of a cold wallet will be wasted.

Another suggestion is to back up properly. Although hardware wallets are usually drop-proof, water-resistant, and fire-resistant, you should still store them carefully to avoid collision damage. It’s best to back up your private key or seed phrase using paper or a USB drive, just in case.

From market trends, the number of crypto wallet users is growing rapidly, and the hardware wallet market is expanding as well. This means more and more developers are entering the field, competition is increasing—but that’s good for users. To fight for market share, manufacturers have to improve security, expand the range of supported coins, and lower prices. So the timing to choose a cold wallet is still pretty good right now—there are more options, and prices are more reasonable.