[imtringued]

>In the grand scheme, the "tons" (or rather, gigajoules) of energy wasted by the Proof-of-Work are nothing.

>but we humans are insignificant on this scale; there is really nothing that we can do to even accelerate our Sun's death. We're not even Kardashev-1 :)

I am shocked that you are brave enough to write these things in the same comment. The problem with Bitcoin and proof of work is that it's literally capable of consuming our sun and all energy in the universe.