I always read about public keys,private keys and speedphrases that you need to store them in a paper wallet or hardware wallet. The only thing I ever stored are the passphrases (those 12 or 24 words) I get from metamask or other wallet provider in the beginning of creating a wallet. Is this enough when I write them down and secure them?
Never had one, but paper wallets usually have a QR-Code to scan if you want to send transactions. I don’t like the idea of a paper wallet. Paper just doesn’t like water and fire, too many possible points of failure. Generating the wallet could compromise your key too.
You can turn an old phone into a cold wallet with AirGap Vault for android or iOS. For Bitcoin, Electrum can be used on an offline Computer. Hardware wallets are the easiest solution and they’re around 70 bucks I believe
Most important thing is to create a new wallet and not to use an old wallet that was a hot wallet before