I invested on many ICO from 2016 until 2020 and get many worth ICO and bad ICO, but I think usually when getting bad ICO with lower price after listing and I know is risk I have faced when start investing on ICO project, just one reason I don't like with ICO because never give exactly date with their coin listing on the market.
Do you still wish to invest in ICO like 2016-2017? I think that will not happen again and now that ICO's popularity is fading, don't expect investment there to be much better, IEO, which has a good reputation.