I don't think if it is still worth investing in ICO projects because 99% of them are scam and many investors are not investing anymore in ICOs, they prefer IEO and IDO but still you have to be careful when choosing a new project to invest because there are still scam projects even in IEO and IDO.
Right, even though IDO & IEO also both aren’t 100% guaranteed way to profit by investment, In that case i would like to recommend to invest on top tier Exchanges launchpad projects those can be around 10x-20x profitable most of the time. There're so many lower exchanges run shit/scam projects IEO just because of they got paid by team.
The big name launchpads usually do increase a lot for the short period but you should not always stick long term in case they drop very sharply as well. At the end of the day, the hype from the launchpad wears off and you end up with just a simple token. If the project doesn't do anything to entice people then we will just be holding a bag.
So, if your only aim is to profit, you are not investing because you like the project, then you have to just simply sell it and get out as soon as you see enough profit. I am not saying that you should find other methods, if you like this then do it but if your only aim is to profit then you should be a lot more careful about it then long term investors.