Ever since ETH adopted PoS, things have been going into the wrong direction. The network is as centralized as ever with a few big players controlling a large portion of ETH's supply. On top of that, the vast majority of nodes are running on top of Amazon Web Services (AWS).
I'm not sure the future is so far away as it's clear what's showing and pointing towards the next bull cycle shows that ETH is still showing that they're worthy of the position, looking at things like L2 being pursued today or not even with previous ETH competitors, ETH will always be the object of great attention in market movements.
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.
I see that as not a problem, what we are looking at is superficially like the story of the leader driving the product, and of course something as big as Ethereum will not be able to succumb to this problem, the team is not only Vitalik, there will be replacements to help the project operate and develop after many generations. The story that comes to mind is that corporations as we know them last for decades, and they continue when the leaders change.