> "Who has the authority to ban crypto?" > The answer is the government.

The gov't is supposed to represent the people's will. So are you saying that it is the will of the people to ban crypto? Aka, is crypto something that is causing harm to society, like heroin addiction etc?

Let's go back to the prohibition era - why did the gov't decide to ban alcohol? And why did they re-instate it back afterwards?

I argue that gov't is not an "authority" - they merely execute the ban. The authority lies with the average views of society. Bans on slavery, for example, is only possible because most people slowly came around to disliking it (mostly people who don't benefit from it - while those who do vehemently fought against the banning).