A cold wallet is a secure method of storing cryptocurrencies offline, reducing the risk of hacker attacks.
There are two main types: hardware wallets, such as Ledger or Trezor, which are physical devices where private keys are protected, and paper wallets, which consist of a paper where the public and private keys are printed.
To have a cold wallet, simply purchase a hardware wallet from a reputable manufacturer, set it up following the instructions and write down the seed phrase in a safe place, or create a paper wallet with reliable tools. Then, simply transfer your cryptocurrencies from the exchange or hot wallet to the cold wallet address.
It is essential to never share your seed phrase or private keys and to ensure they are protected from damage or theft.
