Zcash and Dogecoin on Proof of Stake? If Vitalik Buterin has his way, yes.
Ethereum has been running on Proof of Stake since the Merge on September 15.

Ethereum has been running on Proof of Stake since the Merge on September 15. Co-founder Vitalik Buterin hopes other major blockchains follow this example. Two examples he cites are Zcash and Dogecoin. Vitalik hopes the two coins will switch their model to Proof of Stake, according to the 28-year-old in a recent interview.
Buterin said: "Now PoS is mature, I expect it will gain legitimacy over time. I hope Zcash and Dogecoin transition to PoS soon."
So far both blockchains run on Proof of Work. Many critics see PoW as energy-intensive due to the mining aspect. Dogecoin is currently ranked 10th in the crypto rankings as the most valuable memecoin, with a market capitalization of almost nine billion dollars. Zcash is regarded as one of the top privacy tokens and sits at 61st in the crypto rankings, with a market cap of $750 million.