It depends upon the coin because most of the coin prices will increase after listing and after due to sudden pump the price of coin decrease it's a price to a lower value than their ICO price. From there the coin price is based on the developments and improvements from the team, that we should start trading with the coin which has active developments and updates from the team.
there were times when you could quickly expect an increase as everyone was already waiting to be able to finally buy.
every ICO with -40% was guaranteed profit because at least the ICO price was always achieved.
and now? you have to be happy if you get out without much loss.
But it was during a bull market when projects sometimes reached hardcap of several million within a few hours. There were simply a lot of investors. When projects have a hard time achieving softcap, giving big discounts kills the price after entering exchange. Unfortunately, developers have come up with the idea that they will attract investors by giving large discounts. This is the main problem that causes the price to fall immediately after entering the exchange. If tokens sold at a large discount were secured with a lock period, then this situation could be saved, but often the price is not protected even in this way.