Vitalik has been selling a lot of ETH lately and that's concerning to me.
Although he has been spending it for the development of Ethereum ecosystem, it still is concerning because it adds to the selling pressure which ETH is already facing.
But it's good that he is transaparent about it and has been selling it in a planned and organized way.
Main concern i have with cryptos is with big whales, especially with Proof of Stake, so imho every time a whale sells, it's a good thing as it gives more people opportunity to buy cheaper, then if they hodled.
Also people were were afraid that eth is centralized around Vitalik, and Vitalik has stepped down from development, and less of a center he is in terms of a bag size, the better it's for the decentralization ideology.
From point of centralization, yes, even I believe that its rather good if the whales sell their coins in the open market.
Firstly, it adds in more liquidity and secondly, it gives the opportunity for others to buy more coins at cheaper prices.
Also, it distributes the coins from a single entity to a multiple entities which is good for decentralization.