Looking from the outside, all the ones which matter seem to use PoW systems.

> and others are going to switch away from PoW (such as ethereum).

I've been hearing that for years, and it's always six months away.

Not sure this is the right metric, but you can see that the top of the list seem to represent the bulk of all crypto currencies. And if you want to include Tether, it’s apparently based on Bitcoin and Ethereum blockchains.

Bitcoin is proof of work, and is showing no sign of switching to something else. Ethereum is proof of work, and hasn’t switched to proof of stake yet. I mean the tech is ostensibly there, but last I checked the merge still didn’t happen. Even if it was just those two, I would not dare call them "some crypto currencies" like they were marginal. Bitcoin and Ethereum, aren’t marginal, they’re basically the majority all by themselves.

Also, I’m not sure how trustworthy proof of stake actually is. I’ll believe it when Ethereum actually implements it at scale.