-3 points
three raspberry pis would also use more power than 2. it doesn’t mean that Bitcoin is designed to waste power. it means people are willing to spend energy on mining
3 points
But it could be done with 2. The third one is spending power for no common good.
-2 points
not for a common good, but the other two can hardly be said to be altruistic either.
3 points
Exactly, it’s a system where everyone running the infrastructure is a greedy dick