I am sure that over time, the anonymity of Bitcoin will be less, and therefore money laundering operations and other illegal activities involving Bitcoin will disappear. Already we can say that cash is much more used to pay for illegal operations than cryptocurrency, since the blockchain has a trace of mutual settlements that can be traced in principle.
If over time, the anonymity of Bitcoin becomes less, then it sort of defeats one of the cons of cryptocurrency which is anonymity if I may say. I stand to be correct!