The smallpox blanket givers are maligned now but they and their people (~europeans) did grab and are still holding 97% of the territory they set out to conquer. History is written by the victors, and it's questionable whether this outcome is actually beneficial for mankind / the planet. On the surface it is - look at all the tech! On the other hand the tech actually results in an ever growing rate of destruction (of native nature and culture, aka. whatever was there before), and that trend was visible from day one.
In other words, bitcoin & co. aren't the first toxic, destructive get-rich-quick schemes, and we as a society have shown time and again we're unable to really resist most of them.