That depends on the potential elements of those ICOs. If you feel really potential, you should sell. You should only keep these ICOs really going to thrive in the near future. Long-term trading is still the best approach.
What is your potential? In my understanding of the potential, this is what connects the project, or rather the idea of the project with its implementation and relevance to the community, but since now we see a global decline in interest in crypto-currencies, it's hard for me to talk about the opposite