Exactly greenflint.Bitcoin is a crypto currency and if the...

Exactly greenflint.
Bitcoin is a crypto currency and if the ability of convert crypto to USD, AUD, etc is banned, it will destroy the crypto bull and will be severely revalued.
Governments want to protect their own monopoly on currency. Controlling currency give them the right to stealth taxation via currency inflation.
Governments can easily shut conversion of cryptos, via the banking system. Its already happening as some more conservative banks are derisking their books and will not allow bitcoin exchanges to have bank accounts. In addition payments from crypto exchanges are tracked and can be shut out of the system.
The banning of crypto will be for the "greater good" and the lucky punters will be shoved under a bus.
All of the above scenarios could be applied to gold or many other things, but crypto will be the first to be sacrificed.
Any 'super' normal profit can be taxed at the end of the day. Us peasants are not allowed to win, if we are winning using their existing rules, the rules will be changed.
To paraphrase George Carlin. "We have no rights, we have privileges, and privileges can be taken away". Doesn't matter if it is 1930 or 2020, ugly government and human behaviour is still the same.