Yes... it is like a needle in the haystack. But the problem here is that most of the financial crime is being done by big banks and they have lobbyists in every powerful position in the government. So the government authorities may hesitate to touch them. Did you heard about the scandal involving the HSBC bank and the Mexican drug cartels? There was a lot of hue and cry initially, but everything was hushed up in little time. Bitcoiners are easy targets, since they don't have collective bargaining power.