What I never got was why I would want to use these things as currency. Cryptographically write down everything I ever do financially? I am going to go with no

What I never got was why I would want to use these things as currency. Cryptographically write down everything I ever do financially? I am going to go with no on that one. I do not really care I bought a stick of gum 20 years ago... These things strike me as a privacy nightmare.