Originally Posted by
MaxQ
Cash requires a physical presence in order to take possession of it.
As for tracing crypto perhaps we are using different or incorrect terminology. But currently there is not a method (that I am aware of) for finding the people behind crypto crime. If there was we could put an end to ransom ware attacks.
It's not a matter of not being able to trace it or find them, it's a matter of law enforcement actually putting resources into it AND the perps being in a country where we can do something about it.