Crypto is only as secure as your access to the internet, and only as private as current tech companies make their devices to transmit over utterly surveiled isp’s. I don’t know about you but it’s not even possible for me to go buy my neighbors lawnmower with crypto right now, and yet with cash I can go buy almost anything I want anonymously right now aside from some major items, so I have no idea what you mean that every transaction with cash is tied to my SNN. And to assume crypto decryption doesn’t exist is just naive. And so is assuming it wasn’t created by the powers that be now just because it was revealed to the world with a secret letter from a secret person that said it was designed to save the world from tyranny. And that’s not even mentioning that mega banks are currently amount the largest owners of crypto.