Where I live, kids under 15 have to wear a helmet while biking. But I never see any kids wearing helmets. Because laws that cannot be enforced will be ignored freely. Piracy is supposedly illegal, but look at the attitudes towards it: it's not considered a crime because it's impossible to enforce.
Perhaps bitcoins while be regulated, but will it not get green-stamped by the general public just like piracy?
Let's put it this way: if it is a crime to exchange USD for Bitcoin, where are you going to get your Bitcoin money? Bitcoin would die overnight if exchanges went away, and most people are not going to send an envelope full of cash to some shady person on the Internet.
Perhaps bitcoins while be regulated, but will it not get green-stamped by the general public just like piracy?