Recently, more and more people around me have begun to pay attention to asset security issues—especially after experiencing several large-scale wallet theft incidents. As it turns out, the topic of cold wallets isn’t actually that complicated, but many people still don’t understand exactly how to use them.

First, let’s talk about why cold wallets have been so popular these past two years. On-chain interactions are indeed convenient, but there have been far too many cases where assets were lost due to poor management of private keys and seed phrases. Some people forget their seed phrases; some have their private keys stolen after being tricked by phishing websites; and even others lose their phones and end up losing all of their assets right away. At that point, cold wallets become especially important. The core logic is actually very simple: store the private keys on an offline device, so hackers can never access them.

Cold wallets generally refer to hardware wallets—of course, paper wallets and USB wallets also count. Their operation is in two steps: first, generate a pair of public and private keys. The public key is your address, used to receive funds; the private key is like a password, with the authority to move all assets. For easier memorization, the wallet will generate a seed phrase of 12 or 24 English words. Then, store these crucial pieces of information on an offline device, using physical isolation to prevent attacks.

When choosing a cold wallet, I think you mainly need to consider these dimensions. Security comes first—you should look for products with strong encryption and multi-factor authentication. Compatibility is also critical: make sure the coins you hold are supported. Then there are cost and user experience. There’s no need to chase the most expensive option, but you also shouldn’t buy something too cheap. There are many choices in the market right now, such as Ledger Nano X, which supports more than 5,500 coins; Trezor Safe 5, which has a touchscreen and a higher level of security certification; and SafePal S1 Pro, which supports over 30,000 coins and is relatively affordable.

The process of using a cold wallet is not complicated either. When making a transaction, connect it to your phone or computer, enter your PIN to unlock it, initiate the transaction, and then verify and confirm on the device. After the transaction is complete, disconnect and go offline. In this way, the private key always stays in the cold wallet, greatly improving security. However, be careful not to connect to unknown DApps—otherwise, a cold wallet can be as vulnerable to attacks as a hot wallet. Also, even though hardware wallets have drop-proof and water-resistant features, you still need to store them properly. It’s best to back up the private key and seed phrase on paper or on a USB drive.

Compared with hot wallets, cold wallets have the advantage of higher security and are suitable for long-term storage, but they are relatively more cumbersome to operate and require purchasing a device. Hot wallets are free and very convenient to use, but they offer lower security and are therefore more suitable for everyday transactions.

From industry trends, the number of crypto wallet users has grown rapidly in recent years, and the hardware wallet market is also expanding at a fast pace. It’s expected that more innovative products will emerge in the future. As competition intensifies, developers are continuously optimizing security, cross-chain support, coin coverage, and pricing. For users, this means there will be more options for cold wallets and security protections will keep getting better. If you hold a certain amount of crypto assets, considering a cold wallet is definitely a good choice.