Recently, many people around me have been asking me about cold wallets, so let’s get this sorted out clearly.

To be honest, many people only realize a problem after entering the crypto world—just how important it is to manage private keys and seed phrases. Anyone who’s ever lost money understands that feeling, so more and more people are seriously considering using cold wallets to properly store their assets. But with so many cold wallet options on the market, how do you choose one? How do you use it? These questions are definitely worth a good conversation.

Let’s start with the basics. There are two types of wallets. One is hot wallets (software wallets), which are installed on your phone or computer—convenient, but relatively higher risk. The other is cold wallets, which are stored on offline devices and are more secure. “Cold wallet” usually refers to a hardware wallet, but it also includes forms like paper wallets or USB drives.

The working logic of a cold wallet is actually not complicated. First, it uses encryption algorithms to generate a pair of a public key and a private key. The public key is like your account or address: it can be shared publicly to receive funds. The private key is like a password that controls all the assets in your wallet. There’s also something called a seed phrase, usually made up of 12 or 24 English words. It’s essentially another form of the private key, mainly for easier memorization. The key point is that cold wallets are not connected to the internet; they store private keys using physical isolation, which effectively helps prevent attacks from hackers and malicious software.

Now, there are several hardware cold wallets that are relatively popular on the market. Ledger Nano X is from France. It supports more than 5,500 cryptocurrencies, and its security certification reaches the CC EAL 5 level. It’s priced at around $150. Trezor Safe 5 is made by a Czech company. It has an even higher security level (CC EAL 6+), includes a touchscreen, supports more than 1,000 coins, and costs about $170. There’s also SafePal S1 Pro, which supports over 30,000 cryptocurrencies, is the most budget-friendly option (around $90), and supports USB-C and QR code connections.

When choosing a cold wallet, you mainly need to look at four areas. Security is the top priority—you should have strong encryption and protective measures like multi-verification. Compatibility is also important—you must ensure it supports the coins you hold. In terms of cost, prices range from several dozen to a few hundred dollars, so you need to consider value for money. Finally, there’s user experience—wallets with a friendly interface make it easier to manage your assets. You can usually find this information on the official websites, and user reviews are also quite useful as a reference.

Using a cold wallet isn’t difficult either. If you don’t already have a public/private key pair, you can generate one using the cold wallet. When you truly use it, you need to connect it to your phone or computer and enter a PIN or password to unlock it. After initiating a transaction, just verify and confirm it on the device. Once the transaction is completed, disconnect it again so the private key returns to an offline state, which is relatively safer. But remember not to connect it to unknown DApps casually, because cold wallets can also be attacked. Also, although hardware wallets are designed to be drop-resistant, waterproof, and fire-resistant, you still need to protect them properly. At the same time, it’s recommended to back up the private key and seed phrase with a paper copy or a USB drive.

Compared with hot wallets, the advantages of cold wallets are very clear. Hot wallets store funds online, making operations convenient and suitable for frequent trading, but the risk is higher. Cold wallets store funds offline, offering higher security and being suitable for long-term holding, but the operation is comparatively more troublesome. On fees, cold wallets require an investment of $50 to $500, while hot wallets are usually free.

From market trends, the number of crypto wallet users has been steadily increasing, and the market size for hardware wallets is also expanding. Competition is getting more intense, which is actually a good thing—developers continuously improve security, support more coins, and lower prices to capture market share. So if you have a need to hold assets long-term, carefully choosing a reliable cold wallet is definitely worth it.