Private keys aren't passwords, you don't "hold" them in a list lest memorize them all (Is that even possible?).
"Everyone" shouldn't hodl private keys like it's his account number, it shouldn't be displayed at all unless necessary.
Except if you're planning to sweep the funds to another wallet or for making a paper wallet.
but not each of the private keys of your addresses.
Keep your wallet encrypted, in a secure storage and device (also your SEED in a piece of paper); that's where your private keys should be.