Proof of Stake is definitely the future. A lot of purists and maximalists argued, caused chaos in the market. But Energy issues are real and almost every country is trying to address this issue. I am not surprised at the fact that many nations including investors would opt out of the blockchains that would require "Proof of Work". I personally am pushing for delegation and proof of stake based chains among people I know. I wonder how this changes in 2022 for those who hard bent on POW. You can read the news: https://beincrypto.com/proof-of-work-ban-proposed-by-eu-finance-regulator-to-curb-energy-usage/