If I can add to that....
You've seen a shift in the two largest networks, Bitcoin and Ethereum. In Bitcoin mining, which uses electricity and computing hardware to validate the network, they are essentially arbing the cost of electricity. That's the simple way of thinking about what they are doing. There is an incentive to co-locate that activity next to renewables using cleaner sources of energy. What the percentages of that network are, I can't speak to at this time, but I know that they are incentivized just through economic forces to do so.
Ethereum, the second-largest digital asset by market cap, has transitioned away from proof of work to something called proof of stake and has reduced its energy footprint by over 99.9% because there is no more electricity in computing hardware, a commodity external to the network, being put at risk. Instead, it's the native token.
These things are moving toward greener solutions. Can they continue to get better? They can, 100%.
I also think it's important to think about every activity we do in society as something that consumes energy. When people say to me, “Don't you find some of these activities wasteful?” I ask them if they believe in watering lawns for people to go on a golf course, or turning on Christmas tree lights during the holiday time. Everything uses energy. The question is whether we think it's a good use of our energy.
The reason to be excited about these blockchains or blockchain technology is that we think a global settlement layer, a global financial system that's not run on corporate servers in a specific jurisdiction, is something that is very valuable. It's something that we can debate. People will have different opinions, but to me, that's the way to frame this question. Everything consumes energy. It's a question of whether we think this is a good use of a limited resource that we have as a society.