I mean, there are extremely private blockchains? But surprise surprise, as the raison d'etre for their existence becomes "crime" the agencies responsible for suppressing "crime" tend to suppress those blockchains. My viewpoint on it is that there are two wolves in crypto - the one that allows greater efficiency and freedom in payments for law-abiding normies and the one that allows shady fucks to be shadier. Let's be clear: the criminal underworld didn't need crypto. Crypto basically allowed nerds to pretend to be criminal overlords for a few years. It again comes down to the foolish belief held by precocious sociopaths that they can beat the government at math and computing without recognizing that the government has the whole of the statute of limitations to crush them.