If you are a greedy kind of person then for sure it would be sky is the limit but for a wise investor you would secure up some target percentage depending on whats into your mind but usually for me when i do see some gains  regarding on an ICO investment i do really sell it and secure it for myself.Dont  push or force to have x2 or even more because theres no assurance for a coin to hit it up specially when it was just starting.