Currency is just a tool to ensure the function of exchange. It can be used both for good purposes, and not for the best. Just like an ordinary pencil you can kill a person, but you can paint a picture.
And in proportion to more familiar currencies, like the ruble or $ evil and in general everything bad is done proportionally at times more than for crypto-currencies. Simply because they provide the same exchange functions. And someone does it not for the most good purposes.
RE: Builders of pyramids and sellers of air