[splintercell]

> Bitcoin's rising power usage doesn't achieve a greater capacity, it's simply the result of an arms race between miners.

When the difficulty rate rises the network is more difficult to be attacked. The upper limit to the difficulty rate is the point at which the miners can be profitable. We want the network to be as secure as possible. Though, I would say that we also want the network to be as efficient as possible (ie larger block size for more tx per block) like in Bitcoin Cash.