> the energy and human lives spent on war to maintain dominance

This is a really important point that I want to emphasize. Maintaining the value and scarcity of a fiat currency such as the dollar requires strong law enforcement and ultimately, for a global reserve currency, dominating military power. Bitcoin mining is a rounding error compared to the peacetime US defense budget, let alone all the externalities associated with militaries and war.

This is still a big if, but if the function of establishing a scarce digital global reserve currency can be done by an algorithm without relying on law enforcement or militaries, at a fraction of the cost, that is a huge win for the world.