i think Best way to store your bitcoins safely is the trezor hardware wallet. These are offline wallets and can only be accessed when you have attached the USB stick and along with it know your pass phrase and keys. This really is the safest way to store bitcoin so far in a way that they just can't be hacked into. Now on number two comes a simple private key wallet one like the electrum. You just need to store the private keys with you and tada your wallet just can't be hacked into and If you want to keep your bitcoin offline but dont want to deal with a hardware wallet, you might want to consider a paper wallet instead. This is really just a piece of paper with your public and private keys printed on it, which can be used to access your bitcoin