Such a move shouldn't effect the promise that virtual currency holds. For instance, a simple example, virtual currency can help eliminate currency considerations and empower local retailers to sell to cross border buyers. Twenty percent shifts in Sterling or Dollar or Euro become irrelevant to one-currency-online shoppers. Global web, global commerce. But there will genuinely be those who seek to subvert and exploit the system. Admittedly, most financial crime we've seen in the last five years has been committed by men in good suits, but this isn't really about financial crime, it's about preventing the hiding of money acquired as a result of other crime.