A currency that's not useful as a currency poses no threat at all.
Just like outlawing cocaine and marijuana. We may eventually have a War on Cryptos that lasts decades and costs trillions and imprisons millions.I thought this originally. No govt is able to control Bitcoin. Outlawing it is futile. Their best bet is to “try” regulating it, and even that, will have to be done by “gentleman’s agreement.”
Govt will seek a way to control it. My guess is they will start competing crypto currencies only they will be fully tracked which i wouldn't doubt that Bitcoin already is.