Well, if Bitcoin goes mainstream it seems like we could expect it would require 51% of all computational power on the planet at all times, which would indeed be horrific as well as tragic, IMO.
Sure, the perfect currency is valuable. But is such a sheer brute-force approach to security the best we can do?
What makes you think it would require 51% of all computational power? That would only be true if there were no other valuable things to compute, which is very unlikely to be the case.
Sure, the perfect currency is valuable. But is such a sheer brute-force approach to security the best we can do?