A cryptocurrency wallet is a software program designed to store your public and private keys, send and receive digital currencies, monitor their balance, and interact with various blockchains. You need to have a cryptocurrency wallet to manage your crypto assets and keep them secure.
There are many cryptocurrency wallets out there, but the essential distinction between them is whether they are hot or cold.
A hot wallet is connected to the internet and can be accessed at any time. A cold wallet is not connected to the internet and allows to store your funds offline. You can still receive funds at any time, but no-one can transfer them out.