Opposite to some I think that regulation doesn't have to be bad for bitcoin and regulation doesn't have to mean ban or taxation but it also can help bitcoin to be full implemented into society and finances and make boundaries between use and misuse.
I think EU will soon bring some directive that will regulate all cryptocurrencies.
I'm not quite sure that regulation would be good for bitcoin. My main concern is that people will be forced or tempted to disobey the rules once they are established due to bitcon's nature which opposes any regulation. I mean to say that when people can, for example, evade taxes, and bitcoin grants them this opportunity, they will definitely try to pull it off. And taxes may not be the only or primary concern of governments as soon as people start to massively violate these regulations whatever they might be.