You post was very interesting (what happens to Bitcoin when it becomes so big it's capable of tilting G7 type economies) up to the argument above, which is:
a) wrong because Bitcoin does have some actual utility
b) wrong because "value" is only something that carries any kind of meaning in a supply and demand framework
c) parroting an argument that has been trumpeted on HN almost as much as "oooh, bad for the environment" and has also been thoroughly debunked.
You post was very interesting (what happens to Bitcoin when it becomes so big it's capable of tilting G7 type economies) up to the argument above, which is: