What you think more profit, participate in IEO or wait after IEO and buy the token from exchanges?
But in IEO there is a bonus when buying the coin, and can trade faster, because most tokens that are in exchange can be directly traded even though the deposit mode is not active.
Well, the advantage of buying IEO on a large exchange will be more profitable because the deposit is not activated, the IEO participants will enjoy a profit of more than 3x-5x, and on average after the deposit is opened, the price tends to decrease because there are many tokens dumped there.