Reminds me of this XKCD: https://xkcd.com/538/
With bitcoin you can't even just rely on memory for the keys, you need something physical that can be taken away from you.
With bitcoin you can't even just rely on memory for the keys, you need something physical that can be taken away from you.
Of course, private keys are practically unmemorizable, but you can restore a Bitcoin wallet with your seed phrase.