> (And there's BTC holders with more than 0.3% of all BTC)

And yet, they can't stake their Bitcoin gain influence in the network. They're just another user in user-land

Satoshi mined every single one of it and anyone would have been able to do same also he never sold his coins and left the project early on to avoid having too much control. Quite the opposite with Vitalik who on the other hand premined his eth, has been selling them Ever since, and continues to have significant control over ehereum.

Satoshi is not actively working to move Bitcoin to PoS though. And for all practical purposes, his stash is as good as gone.

That's fine as long as we agree that Ethereum is not a form of currency, otherwise it becomes terribly regressive for one person to have that much stake that continues to collect even more ether in the process.