I don’t believe that’s true at all. The two times Bitcoin has actually gone down significantly and not instantly rebounded were both because of scares of Chinese authoritarianism. Chinese people have a lot of the same concerns as anyone else. They don’t want their earnings stuck in fiat money. Occasionally, they get scared about the government’s response. Then, many of the speculators get scared. I was a HODLer the first time, and I’m a HODLer this time.
The Darknet deals in Monero and other more completely anonymous cryptocurrencies. The Mafia does pretty much all its money laundering in FRNs.
OK, I don’t want to get in an argument. 
I see a reply I left has been orphaned by the deletion of the post it responded to, I have removed it to follow suit.