You think the current global financial system is energy efficient? How about the raw materials used by global militarizes financed by unending money printing? If you fast forward a couple decades, and Bitcoin becomes the global reserve currency, mining will be far more efficient than the amount of enormous military spending and middle-eastern oil production financed by fiat currencies and the petrodollar standard.
You people are advocating for shutting down one of the most important human advancements of all time – money that is directly linked to energy.