Yes, our governments can't control the bitcoin but they can make it illegal in our countries so that we can't use it no more.
We made the government to ourselves. We gave the full power government to do with us whatever is the best for us. The government can't survive without ourselves, without control we can't survive. Without tax, the government wouldn't support Bitcoin and it's secure transaction process. Do you believe the USA and China don't use Bitcoin this time?
If the government was in a democratic country or people have that likewise attitude, I think they won't ban cryptocurrencies and declare it was illegal. Remember, the government is just the extent of people's will to manage and lead, make a decision to improve our standing. If everyone sees cryptocurrencies or Bitcoin as a way forward then the government can't do anything about it. Cryptocurrency is just a way to return the currency to its root, for only people and how they see fit to use it.