It's not just a matter of Ethereum's price. They have a foundation where they make decisions on the future of the project but the changes will never harm them financially. You have Vitalik, the creator, who dumped most of his coins. What kind of message does that send to the community when the people closest to the project dump and cash out? There is the decision to go from PoW to PoS that again incentivized bigger stake holders and will probably be the reason why ETH will never again be as valuable as it once were. So many of their smart contracts are flawed and have been exploited due to bugs or perhaps intentionally made exploitable. Of course there is the drama with the DAO hack from many years ago where they simply wiped and changed the history so they themselves wouldn't lose money in the incident.