Indeed, they have a right to make regulation but they have no right to manage the utilization. You can imagine how difficult they are if they ban crypto currency because in the internet field we have many ways to passed the ban. We still can use VPN and another way to access an exchange as an example. So as, the government decide to make regulation will ban crypto currency is a useless way.
How they can regulate bitcoin that the fact that this has a decentralized nature and no one under control of this currency. Technically, they won't able to ban or just wasting their time because people still can use bitcoin in different tools use without even knowing if that is prohibited in your place. There are too many countries that had attempt to ban bitcoin, China and Indonesia as far as I remember but until now people keep accumulating bitcoin hoping to have again profit if they will invest in it. If banning is the purpose, I don't know how it will work but even shutdowns power source electricity bitcoin can still run without power.