Recently, a friend asked me how to safely store crypto assets and how to choose a cold wallet. This is indeed a good question because on-chain activity is so frequent now, many people find hot wallets convenient, but managing private keys and seed phrases is really a headache. I’ve seen quite a few people around me lose assets due to poor management, so the demand for cold wallets is indeed rapidly increasing.

Actually, the principle of cold wallets is not complicated. In simple terms, it involves storing your private keys on an offline device, mainly including hardware wallets, paper wallets, or USB wallets. Unlike hot wallets connected to the internet, which are vulnerable to hackers, cold wallets store assets through physical isolation, effectively preventing malware and network attacks. The workflow involves two steps: first, generate a pair of public and private keys; the public key is like your account used to receive assets, while the private key is like a password that controls all assets in the wallet. Then, store the private key offline to ensure security.

There are many types of cold wallets on the market now. I’ll briefly introduce a few popular ones. Ledger Nano X, made by a French company, supports over 5,500 cryptocurrencies, with a security certification level of CC EAL 5, priced at $149. Another is Trezor Safe 5, produced by a Czech company, with a higher certification level of CC EAL 6+, supporting over 1,000 tokens, priced at $169. Additionally, SafePal S1 Pro is also good, supporting over 30,000 cryptocurrencies, with the cheapest price around $90.

When choosing a cold wallet, I recommend considering several aspects. First is security, which is the most critical; look for products with strong encryption and multi-factor authentication. Next is compatibility, ensuring it supports the tokens you hold. Then is cost—there’s no need to buy the most expensive, but make sure the value matches the price. Lastly, user experience—an intuitive interface makes managing assets easier. These details can usually be found on the official website or by checking reviews from other users.

When using a cold wallet, if you don’t have a public-private key pair yet, generate one first. When you need to make a transaction, connect the cold wallet to your phone or computer, enter your PIN to unlock, and then initiate the transaction. After initiating, verify and confirm on the device. Once the transaction is complete, turn off the device and disconnect from the internet, and the private key returns to a secure state. A special reminder: never connect to unknown DApps, or the advantages of a cold wallet will be wasted. Also, although hardware wallets have drop-proof and water-resistant features, it’s best to protect them well—preferably by backing up the private key and seed phrase on paper or a USB drive.

Compared to hot wallets, the biggest advantage of cold wallets is offline storage, which offers much higher security, but the operation is relatively cumbersome and requires an investment. Hot wallets, on the other hand, are more convenient and faster to use but pose greater security risks. So, if you are a long-term holder, a cold wallet is definitely the better choice.

From the market perspective, the number of crypto wallet users has reached around 68 million. The hardware wallet market size was $400 million in 2021 and is expected to reach $3.6 billion by 2032. More and more developers are entering this field, increasing competition, which is actually good for users because manufacturers have to improve security, support more tokens, and lower prices to compete for market share. Therefore, the future development space for cold wallets is quite promising.