Ethereum is not sound money.

Being deflationary doesn't make something "sound money". Sound money is just money without a central bank. The Ethereum Foundation is the central bank of Ethereum. They forked the chain just to reorg the blocks so they could get their funds back from the DAO smartcontract exploit. As soon as Ethereum stopped being financially beneficial to them, it wasn't Ethereum anymore. This new reorged chain is now Ethereum and the old one where we lost our funds must be discarded. Ethereum is just whatever the central committee of Ethereum says Ethereum is. That's not sound money. They have thousands of employees, a marketing team, a CEO. Jack Dorsey is right, Ethereum is dystopian. Proof of stake is just the cantillon effect we see in current financial system. The more money you have, the more power you have. It's inherently a self-centralising system that concentrates power and wealth into just a few wallets.