Like the op said, thanks to Satoshi Nakamoto who invented this wonderful money system which have, is and will turn the way we use money, to me, I think crypto currencies are changing the world, those who are greedy and greedy because they want to make money and more money.
But like in a city or village, there will be good and bad people living together, that doesn't mean the city or village itself is bad, so it is with crypto currencies, there are good and bad actors operating together in the crypto space, this doesn't make crypto currencies a bad invention.