Yeah...Bitcoin using a lot of energy is an exaggeration. Cash needs all these ATM's all over the place that are basically full computers, plus the servers for online banking, plus all the bank buildings. What does Bitcoin need? Some mining...which people intentionally put in places where energy is cheap and abundant, to maximize profit. And they replace all their equipment regularly, selling them on the second hand market, so they use less energy and make more crypto.
But, The Woz is doing something with blockchain...and there are no real details yet? Sounds like it's going to be a huge success!