You could try to memorize it. I don't have a good answer. Whole novels have been written about the hiding of secrets. Password manager doesn't really help in p

You could try to memorize it. I don't have a good answer. Whole novels have been written about the hiding of secrets. Password manager doesn't really help in principle, as you again need the password for the password manager. One thing I am looking into is Shamir's Secret Sharing to split a secret into multiple parts. https://en.wikipedia.org/wiki/Shamir's_Secret_Sharing https://en.wikipedia.org/wiki/Shamir's_Secret_Sharing