As the other comment said, "illegal transactions" makes no sense. Al Capone's bank account did not receive directly millions from racket and drug selling. Every

As the other comment said, "illegal transactions" makes no sense. Al Capone's bank account did not receive directly millions from racket and drug selling. Everything in there was clean. Where did it come from ? Accounts that are also thought to be clean. Otherwise, if there were direct proof of illegal transactions, he'd have been arrested earlier. The whole point of it is _not_ to get caught. In a space like cryptocurrencies where creating a new wallet to launder your money through and no longer have anything associated with evil_wallet_of_bad_illegal_man (which had all its funds sent to a tumbler and came back to the new account anyways). The whole point of underground transactions is to not be tracked.