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My biggest concern is not only this, but also Ethereum creator Vitalik Buterin. The project is too tied around him. So if he dies (God forbid) or something bad happens to him, you expect ETH's market prices to go all the way down the drain in an instant. It's likely ETH will become worthless after this.
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I don't think so. Ethereum is not only run by Vitalik Buterin, but it's also a team and it is decentralized and open-source. So for me, even Vitalik Buterin will not be here anymore, Ethereum still exist, just like Bitcoin now, Satoshi Nakamoto is gone but Bitcoin is still here, running and kicking.
What I am expecting only to happen is on price of Ethereum, it will react, like dump and it will just go up. Just like before when someone spreaded fake news that Vitalik Buterin found dead.