Should i keep my private key when i fill up in airdrops ?
Yes.Private Keys are meant to be private.
Private key is actually a code that is paired with a public key for text decryption and encryption and is a secret number that allow coins to be spend.Because giving your private keys allows someone to take your bitcoins and spend.It is important for you not to give your private keys to anyone and to write them down on paper in case of computer crashes .
Stay Safe