Before the existence of bitcoin they're many other digital economic assets that is in line with government policies like crude oil, gold and much more, government where comfortable with this assets trading online, including forex but crypto currency like bitcoin that would have change lives and alienates poverty from the world, government are afraid of its cumulative value.
The main problem is actually the government wants to act further to control and the concept of bitcoin is contrary to the system they implement. So this goes in opposite directions which in the end the two cannot unite and even though they are forced the two of them can only walk together not to replace each other. This concept has always been a concern for the government and they don't try to accept it with fluctuating reasons that could harm users. Even though if you look further, everyone is starting to feel comfortable with fluctuations and many people already understand how to minimize these risks independently.
Bitcoin is an assets that we shouldn't lose or allow to dies off, if you check history of all money weather digital or paper bitcoin circulate faster in values and distributions. As highly respected as dollars not all countries have it but bitcoin is 14 years now, the world is aware of it. Do you think bitcoin will stay if government totally remove their hands or stand against it?
This kind of concern has been going on for a long time and they tried to ban it with regulatory limits that were started to be made, but in the end the limits again did not make it a conceptual to ban bitcoin. Now we are no longer talking about opposition or prohibition against bitcoin, but how far bitcoin can provide a choice for people to be made as an alternative in the midst of increasingly depreciating fiat financial conditions.
There is no need to worry too much about that and if they wanted to they would have done a more challenging ban a long time ago, but in fact the ban also can't limit anything and instead bitcoin is experiencing such widespread adoption right now.