Many Countries have put restriction and banning crypto currencies. In this situation which country you think is supporting crypto currency activities? where Exchangers and traders have favorable environment.
Right now, the best ones seem to be Japan ad Switzerland, although I keep hearing that Australia is on a good track as well. I guess that overall, most developed countries are not closing doors to bitcoin, and are doing a decent job in terms of regulation. I just don't like the way some countries are taxing bitcoin, since they want to tax it as property, and that won't be good for bitcoin's goals.