Denizens of the cryptocurrency world ought to get used to rubbing shoulders with regulators. The dark underbelly of the bonanza in  initial coin offerings, rising concerns about the security of cryptocurrency exchanges, and a rush of “Main Street” investors to the scene have helped convince bureaucrats across the globe that cryptocurrency markets deserve a lot more attention. As a US Senate hearing illustrated this week, however, the question of how best to apply that attention is head-achingly complicated. Les mer her