The main difference between a cold wallet and a hot wallet is related to the internet connection:

1. Cold Wallet:

- A cold wallet is a way of storing cryptocurrencies offline, meaning it is not connected to the internet when not in use.

- Common examples of cold wallets include hardware wallets and paper wallets.

- As they are not connected to the internet, cold wallets are considered much safer against hackers and cyber attacks.

2. Hot Wallet:

- A hot wallet is a cryptocurrency wallet that is connected to the internet, whether on a mobile device, desktop or on an exchange.

- Hot wallets are convenient for quick and easy access to funds, allowing instant transactions.

- However, because they are online, hot wallets are more exposed to security risks such as malware, phishing and hacker attacks.

In summary, the main difference is that cold wallets keep private keys offline, while hot wallets are always connected to the internet. Cold wallets are generally considered safer for long-term storage of large amounts of cryptocurrencies, while hot wallets are more suitable for daily transactions and small amounts of cryptocurrencies.