Criminals use more dollars than bitcoins. The currency can't help being used by criminals.
How can you know that? if ever there was a survey that happened. Because I do not think anyone knows for sure criminals, more use dollars or bitcoin. But I think because the dollar is better known, the majority of criminal use this currency. IMO
But I agree if the currency can not be considered criminal. Because currency only objects used by criminals and money should not be blamed.
well it's easy to know,from when dollar was created compared to bitcoin,and if you look back,there's so many drugs lord before bitcoin was created,so they'll definitely using dollar to do an international transaction,that's enough to give you reference that dollar is even worse than bitcoin