I agree that 90$ is not a lot of money. But profits may have to wait several years. And the profit will be proportional to the number of tokens you have and probably it will not be such a big profit if you bought only on $90. In General, different people will evaluate the project and the possibility of buying tokens in different ways.
In my personal opinion, $90 is not that really a lot of money if I can see that it's worth investing in the project. But some people might think differently from us specially if they are new in participating in the projects that need investment. Even me when I'm new here I'm afraid to spend even $1 of my money on new projects.