For me, I never invest in any ICO project, even they are not a scam project or not, when the ICO is over, when the investors received their coin will dump it in the market, so I only invest the coin are listing in the exchange only.
The coins that were trading on the market was also coming from the ico. The investors rarely dumping their coins except when coin got very big ROI but the fact that there are lots of ico coins can grow even higher than before but i know that some people like you didn't wanna try to take the risk by investing in ico.
It's better for people without any knowledge about ico will try to follow your step and they can sell it anytime if they want.