They want to stop it because they can't control bitcoin, people can pay anonymously, so this is the pain in the ass of goverments

Good material mate. I think besides the control aspect, many governments are not trusting the crypto currency market and its assets because of its unreliability and volatility. I mean, a government is there to safeguard the interest of its people, thus, if they see investments that would affect their citizenry for the worse, they would try to stop and avoid it from flourishing, which in turn, would save their people from the imminent failed investments and money loss.