bitcoin is used in many crimes, including drug sales
Yes, but that's also true for literally every fiat currency. So it's a pretty much irrelevant point to even think about.
Hmm, have you heard about the deepweb? Its like the black market in the physical world, where many stolen goods, firearms and even drugs are being sold here. Since the government ca not track every transaction they made, because besides using VPN and stuffs, masking yourself is also a must. So the anonymity of every person here is absolute, I mean do you want to be recognize in that kind of place?
The anonymity is not absolute. That's why several Darknet Markets were raided and closed, with many people getting arrested.
And yes, I do want to recognize that kind of place for as long as the government refuses to respect the freedoms of citizens.
If people want to do drugs, let them. If they were legally accessible we'd have more tax revenue and there would be no drug crimes.
And we wouldn't waste current tax money on prosecuting people who want to put random substances into their own bodies. But that's a whole different topic.