What you think more profit, participate in IEO or wait after IEO and buy the token from exchanges?
To think about cryptocurrency during or after IEO always depends on the offer and price of the cryptocurrency itself. For example, if there is an opportunity to get a good% discount on IEO, then it is better to choose this offer or at least invest part of your funds allocated to this company, and only after you buy some of the cryptocurrency after it is listed.