Both are good as long you make the right picks but the fact is no one is a 100% lucky with their picks. When you're not, you might just choose to wait it out.
Both are risky if you do not do your due diligence. ICOs have given 10X returns in the past but that isn't the case anymore. I prefer trading even if it gives me smaller margins  but they are consistent. Like many have mentioned diversification is a good idea.