I think there are important things that you forget:

1. You cannot own shares or coin of Ethereum, you can only own tokens in the ecosystem. ETH token is equal than any other token except that it will pay dividends if you stake it. However, dividends cannot be very high because transaction costs should be as low as possible.

2. Ethereum has the problem that ETH token is not used as payment in most Ethereum apps. First this makes it less valuable, second in my opinion 99.9% of apps based on a business model relying on revenue in their own tokens will fail.

3. Adding to that although often glorified. ICO model is in any way flawed except for the people who intend to receive the funds and run away with it or make a Non profit project.

4. In my personal opinion Ethereum was amazing the first year it launched. I took Bitcoin consensus mechanism and updated it to its full potential. Now they want to shift to POS but the models they are suggesting will lead to monopolisation. New competition will find new consensus models. Not based on POW and not centralised POS. The ones who find a new model better than Ethereum may make Ethereum obsolete in only couple of months.

The speed at which technology in this space develops now makes it very unlikely for any existing blockchain technology to be leading in 2-3 years time. Newer not blockchain based models with free, instant transactions will come to the market and they will dominate.