Very true...they do.
Technology, for the most part is neutral...it is what man does with it.
Nanobots have potential to eradicate many of the diseases that plague us...or take over the planet like a plague.
Time will tell how we approach it.
All new technologies have a good and bad side, crypto does too.
The downside to cryptocurrency...being a banker. LOL
The downside of crypto currencies is the lack of privacy and orwelian levels of control they bring to government and big companies. Once fiat cash disappears they can literally control who eats and who doesn't. Privacy coins come to the rescue but could be banned everywhere but the darknet so they would only be available to highly advanced users. In other words, the future of privacy will be reserved for highly trained people.