Cryptocurrencies can be kept online or offline. If the cryptos are kept on the exchange platforms or other online platforms, it can be lost due to hacks.
So it is important to choose the best wallets that are safe and secure. Please help me in choosing the safest cryptocurrency wallets
just use any wallet you know you have the private keys to the wallet.. and make sure you keep the keys in a external flash drive.. do not keep private keys in your email address