You have raised a very interesting topic here. The answer is no for bitcoin or for any other similar currency. I am not considering centralized currencies like smart contract tokens or Tether. If we consider currencies like bitcoin and litecoin, trying to get control over it will remain as a big joke for the government watchdogs because it is not possible technically due to the pseudo anonymous nature of blockchain. Without any central location to track, the governments will end up chasing a non existent oasis in the dessert.
However, if you maintain an account with an online wallet provider, then there is a chance of being caught if the company agrees to hand over the user's data to a particular government.
The government can even try to restrict access to the internet within their boundaries the way India tried to ban porn sites. But using tor or vpn, this restriction can be easily bypassed. So it is indeed beyond control of the governments and that's the only bottleneck we are facing towards the adoption.
In general means, they would like to completely shutdown on the things that they arent able to control which blockchain technology or on decentralized coins in the market will really be their priority and figuring it out on how manage it but same as you said this would really like finding an non-existent oasis on a big dessert. There are ways but not totally a big blockage on such increasing adoption of crypto.However, if you maintain an account with an online wallet provider, then there is a chance of being caught if the company agrees to hand over the user's data to a particular government.
The government can even try to restrict access to the internet within their boundaries the way India tried to ban porn sites. But using tor or vpn, this restriction can be easily bypassed. So it is indeed beyond control of the governments and that's the only bottleneck we are facing towards the adoption.
Probably few governments would try to completely shut it down, but the question is, would they be able to do it? I believe no! Complete blockage can't be achieved by any means. Yes, if the government starts ruling like North Korea, that every crypto users will be facing firing squad, then probably it will be achieved through fear. But technically it is not possible. There are ways to bypass government security protocol. People will start using those if a government tries to block the crypto currency by force.
