Some will try to ban it and others will see the opportunity in embracing it. While you will always have detractors, there will equally be those who think the opposite and try to capitalise on it. Whether governments like it or not, there is now an entire economy in cryptocurrency, with many many jobs and fresh ideas being thought of all the time.
Ultimately, I think it will be impossible for any government to ignore it or control it, and to do so would be shooting itself in the foot. There’s just too much innovation in the field to not embrace it. Sure, it’s a kind of a threat to them, but that’s only in a manner of speaking because it’s completely agnostic - you could essentially use the technology for any political ends you can think of.