I want to share a common confusion that many newcomers to crypto often have: the difference between hot wallets and cold wallets. This is actually very important because it directly relates to the safety of your assets.

Simply put, hot wallets and cold wallets differ in their internet connectivity. Hot wallets are always online, allowing you to trade very quickly. Cold wallets, on the other hand, are offline, offering much higher security but are more cumbersome to use.

Let's start with hot wallets. What are they? They are wallet applications like MetaMask, Trust Wallet, or wallets on major exchanges. You install them on your phone or computer, and you can use them immediately. The advantage is speed—great for frequent trading, staking, or DeFi activities. But the obvious downside is that because they are online, they are vulnerable to hacking. If you fall for a fake email scam or if the system has vulnerabilities, your funds could be stolen. Additionally, if an exchange gets hacked, you also risk losing your assets.

Now, about cold wallets. This is what I truly trust for large amounts of money. Cold wallets operate offline, without needing internet to store your assets. They can be hardware devices like Ledger Nano or Trezor, or even paper wallets. Security? Nearly impossible to hack remotely because they are not connected to the internet. Your private keys are completely under your control, not dependent on anyone else. But the tradeoff is that they are less convenient. Every time you want to trade, you need to connect the device or manually enter your keys, which takes more time. Hardware devices also cost money, typically from 1-3 million VND or more.

Quick comparison: hot wallets are convenient but less secure; cold wallets are secure but less convenient. Hot wallets are free, while cold wallets require purchasing a device.

Which one should you use? I recommend that if your assets are large, don’t keep everything in one place. Divide your holdings: 10-20% in a hot wallet for daily transactions, and 80-90% in a cold wallet for secure storage. This method is both convenient and safe. If you're just starting out, a hot wallet like MetaMask or Trust Wallet may suffice. But as your assets grow, I suggest investing in a cold wallet device. Understanding the difference between hot and cold wallets will help you manage your crypto assets much more securely.