Getting your point, everything will fall back to centralization once banks managed to take the majorities, serving as the middleman for their investors to ETH chain,
Not good in the long run, why not allow people to do their own research and managed their own participation with this golden opportunities that crypto is offering for all of us.
Of course. But most people are "blind", and don't care about decentralization as long as they're able to fill their pockets with money. In a society where convenience matters most, people are willing to invest into a cryptocurrency that's profitable and easy to use even if it's utterly centralized. ETH's transition from PoW to full PoS, shows us that the network will become less decentralized over time.
Big players like banks, exchanges and companies will gain all of the advantage on PoS blockchain networks like Ethereum and Cardano. They'll be using customers' funds for their own interests. The same way Binance and Huobi approved the STEEM hard fork which confiscated witnesses' funds, the same could happen with Ethereum in the future. Imagine how disastrous this would become if only a few players controlled the ETH blockchain. If the situation worsens, we may end up with Bitcoin as the only truly-decentralized cryptocurrency on the market. I hope the ETH dev team does the right thing by adopting a mechanism that would prevent staking centralization for the good of the Ethereum project itself. Just my thoughts