It's not about how good an ICO was, many ICOs raised huge sum which made them look good but they were scam and took investors funds with them. Many ICOs that were bad in terms of funds raised yet continued with their project development and are doing well now. Good or bad ICOs should be judged from project development if a project records good ICO without project development it's bad.
I think investing in any project will be risky if you do not study carefully. Now investor confidence in ICO projects is gone, and it will only make you more frustrated to choose this type of investment. In my opinion, it is advisable to look for IEO projects because these are the projects that will bring short-term profits to investors and before participating should only choose high-liquidity exchanges.
short term profits ? so you only invest on ieo because of that and you reject ico for that reason too ?
why not invest on more volatile cryptos because those are better in terms of short term profits but ieo can take a while and ieo are not sure too compare to a crypto coin that is already a pioneer on this field . most of all not all are short taker but people choose ico too because they love the long term effect that ico bring .