Earlier quoted context omitted.
Has anyone tried to calculate the energy expenditure of the fiat currency system as a comparison, ideally per "unit worth" (whatever that might be) since fiat still vastly outcapitalises cryptocurrency?
Yes, and it’s vastly less than Bitcoin. Simply because it’s centralized, and a centralized system is always more efficient than a decentralized one. It’s a well known trade off. A better comparison would be gold versus Bitcoin, as they’re both similarly decentralized. Just comparing energy consumption between the two probably wouldn’t make sense, though, as gold mining e.g. ruins vast areas of land.
Where is it?