This is very unfair and I think the BTC world just lost one of our own here.
I think the stronger message is that bitcoin was able to survive without all the darkweb transactions. And that's positive.
darkweb sustains Bitcoin as it is
dark market +darkweb = +90% from Bitcoin.
you will say that someone may use BTC for trading. I rather trade gold which is a regulated market and the earnings are much higher(losses the same) than shit Bitcoin

)
Bitcoin is mainly use for illegal things as ponzi schemes, illegal forex, drugs, credit card frauds, fake IDs and so on.