I think ETH becomes a monetary network for the banks. POS enables much easier capture to be concentrated at Coinbase. Already built rails to roll out CBDCs.
There’s just too much at stake for them to not want it to succeed. (See what I did there.) So many normies will flock like sheep to yield, especially with nearly unlimited resources to sink into marketing to them.
Also, trust and believe they’ll roll up ETH ETF right into their BTC offerings and nobody will realize. They’ll just want “crypto” exposure.