It's a good question though isn't it? Even if you were to invest in every new ICO, with about only 30% of them increasing in value after being listed on an exchange, their eventual increase in value outweighs the small loss in the other failed ICO's. You can maximize your profit by being particular in which ICO's you actually invest in, being careful to try and read between the lines as to not get duped. IMO it's a fairly sound way to invest money at first and learn what to look for.