There is no doubt that the government will seek to regulate this space quite strongly in the future. Concerns about money laundering are paramount. Basically governments want to know as much as possible about cash flow ' to keep us safe. They will use this panic tactic to push legislation that pushes BTC underground. It's hard to see how a BTC-type product ever becomes a mainstream, especially given how unattractive it is as a method of transaction (expensive and slow)
They need to do that in order to have some control, it's how governments rule, they control people, they control opposition. This picture in opening comment is great example what can governments do about crypto, almost nothing. They are thinking how to control all this but I believe they can't so much at the moment. With crypto it's all about what you do and how you do, if you wish to stay hidden and anonymous you can do that, you can stay free, but if you register your wallet address and you do couple kyc's than you will need to pay taxes.
Governments can't stop crypto, some countries already joined, others should follow their example.