Well, there is digital cash, right? Anything that offers what we call ‘zero knowledge protection’ means that I can prove I am 18 years old without telling you how old I am. I can prove that my accounts still have at least this imbalance, without revealing the balance. I can prove that I can enter into this contract freely without revealing exactly how I satisfy the requirements. And there are even technologies like designated verifier, meaning that if both of us trust an intermediator to arbitrate, we don’t have to make public the fact that we have entered into a contract, and so on and so forth.