I read about the DAO Hack from 2016 and they think to have found the Hacker. It was possible to track him down because he used this wasabi-mixer to make his actions untracable. This Mixing was now demixed and all the anonymity of mixer user is in danger with that.
I have no idea, if this fits here and it is just raw thought. What if hopr would deliver a solution to this anonymity problem and make this visible with a tool/dapp. maybe a former user of such a mixer could connect his wallet and he got showed some issues or even bether gets provided a solution to get full state of the art anonymity?