It is practically useless and not a threat, so they seem to be fine with it. Banks have taken over and milking it as a cash cow. It will keep pumping and dumping. Hypothetically, if govs wanted they could coordinate to clamp down on data centers. Also, bitcoin is bad for use if outlawed, as it is traceable. There is no adoption today and it would be even worse if made illegal, you would need monero, dirty cash and otc deals as no on/off ramps would exist. 

 Tracing doesn't work if it's illegal in the first place.