Do you consider the dollar ethical ?

As far a I know the majority of all drugs, weapons and other illicit products are traded in dollars, not cryptocurrencies.
Most technology is neutral, it are the people behind it that do good or bad with it.

Cryptocurrencies are also neutral, it can be used to fund building schools in Africa without the use of Banks that take a huge fee and it can also be used for buying drugs without leaving to much trail.