"the only people who currently use Bitcoin are criminal hackers, money launderers and drug dealers"
Uh no, so wrong it's impossible to imagine how you could be any more incorrect.
I use bitcoin fairly regularly, for the simple reason that using the graphics cards I already have for gaming to earn Bitcoin is incredibly easy. I use this Bitcoin to eithere buy things I wouldn't otherwise have the money for or reinvest it into more graphics cards to increase my BTC income.
I am not a hacker, money laundered or drug dealer.
There are thousands of people like me doing the same thing, as well as people who simply buy and sell bitcoin to make money from exchange rate variations the same as with any other currency.
While there may well be criminal elements using Bitcoin they are far from the majority. Trying to ban bitcoin because criminals might transfer their currency using it is little different than saying let's ban international currency exchanges to block criminal activity, or ban people from investing in business because money can be laundered that way.
In fact people use cash to buy drugs don't they? Let's ban physical currency altogether, used bank notes that you didn't withdraw from an ATM yourself are even less traceable than Bitcoin.