I dont have much time in the cryptoworld, but i'm interested on how so many people trust on ICOs and claim them to be a good way to simply x2, x3 or even x10 your money.

Correct me if i'm wrong, but a TOKEN Based ICO sell their unique tokens at a price, just so months later the token gets accepted on an Exchange then you can trade those tokens and double your money.
It it really that simple?