Elon Musk is putting the brakes on Bitcoin until the energy issue is sorted out.
He says he is looking at more energy efficient crypto, no doubt "proof of stake" alternatives.
Perhaps Elon will support Chia $XCH rather than Proof of Stake cryptocurrencies. I see many PoS coins fall down and down and they can not recover when the market is bullish since 2020.
The wave of PoS coins is in late of 2017 and first half of 2018. I don't think PoS is the solution for the world. If there are good alternatives for PoW coins, I would choose cryptocurrencies with DAG algorithm. The best candidate for DAG coins is Obyte which was rebranded from Gbyte.
Price was divided 3 folds from the last peak and I think you can consider to accumulate it.
https://coinmarketcap.com/currencies/obyte/markets/