We cant hope that all people are same and using the same strategy.
If youre quite active in the market, you can sell at high and buyback at low.
Take profits from the volatility not just watch it.
In my opinion ehealth is a good long term project, i will watch the progress closely, maybe i can take some profits if i can do the right thing at the right time.
I think you are forgetting the other investor type which combines short&long.
My strategy is to make a basket with short term and long term investments. Mostly short terms are riskier but offering more profit and long terms are less risky but offering less profit. Making a balance with them is my investment strategy. And planning to put ehealth there for a long time.
Since it is understood that this project is likely to become a long term investment, will it be able to generate big ROI to compensate investors?
Of course we must not forget short term investors, who only invest in an ICO to make a quick flip with profit, right after the ICO. But as you said, since eHealth is the prime example for a long term project/investment, I hope they can find enough people who will go the long way with the project and have the patience.