True. It is not for impatient people.
They dont just get a huge value in a day after the ICO. The advertisements will continue and investors will still come afterwards.

We must always remember that ICO's are just the start of one company.
They will be doing a lot more to make it more useful so that they can pull people into using either coins or their own service.
But the problem is they dump it after seeing an ROI and a little profit.
This happens always.