It would be great if everyone thought so. In this case, the prices will never be lower than the original. But practice shows that most people think differently.
A lot of depends how usefull is the project. Sometimes people sell tokens just to get some money. If project is not usefull the price of the tokens can be very small.
Tokens sell when the holders of this coin do not see the development of the project. In the same project, we see continuous development and the team puts a lot of effort in order to increase their community.