[Mc_Big_G]

What about all the cascading costs to run all non-crypto financial systems? Not just data centers, but everything related like infrastructure, real estate, credit card readers, point of sale systems, office furniture, salaries, etc... The list goes on and on. If crypto was used globally, much of these costs and energy waste would disappear.

Also, some currencies like Ethereum are moving to proof of stake, which requires less energy.