since there were so many fuds about Ethereum Foundation dumping hundred million dollars worth of ETH just for salary and some events, the situation with ETH looking quite bad, i'm sure the market cap will still below bitcoin and as the time goes and more eth minted, the price of ETH might go down.
Massive premined coins was intentionally done and years later, after realizing that with no cap, price will struggle to increase more, they launched their Honeypot Burn Program. This program style later was copied by Binance Smart Chain BNB token and many altcoin tokens but we witnessed how it failed with most altcoin projects.
Value of a project is not decided by Buy back and Burn program.