Arguably off topic, but do any cryptocurrency experts here know of any studies on the potential economic effects of a truly (or even effectively) untraceable di

Arguably off topic, but do any cryptocurrency experts here know of any studies on the potential economic effects of a truly (or even effectively) untraceable digital currency? Just off the top of my head I would expect two immediate effects if such a thing really caught on: 1) An increase in many types of illegal commerce. 2) A huge downturn in industries used for money laundering and tax evasion. These might be highly localized, e.g. a bunch of bars might close in City A because that's how the locals wash money; while in City B there might be a surge in "Anonymero" wealth because they make cocaine and are good at shipping it.