“Except in other countries where it is priced in the world’s major currencies.”
I did not mean to imply that its value is only in dollars. It is valued in currency.
“And that should be asked of the banking system too then..”
I am not aware of any bank or credit system saying that the more energy they consume on a transaction, the more secure, the more final (i.e. safe) that transaction becomes. If your point is that such electronic transactions consume (mega) energy, that is another question.
Nor I...
But everything they do takes energy -buildings, computer systems, security.