Relativity is hugely useful for scientists and make predicted with extreme accuracy. So it's a theory, but one could say that it is much more useful than Bitco

Relativity is hugely useful for scientists and make predicted with extreme accuracy. So it's a theory, but one could say that it is much more useful than Bitcoin. Btw, Bitcoin also works based on mathematical theories. If someone were to prove P = NP, Bitcoin doesn't work any more, because I can now steal all your money. The current belief is P != NP, that's why people trust bitcoin, and crypto in general. But it's still a theory.