Investing in ICO gives a large scale profit, if the ICO becomes successful and continues to get listed on large number of exchanges. Same happens with very few altcoins on trading. With trading continued active involvement is a must, without which one cannot predict the market as well can't engage into buying and selling process earning profit.
Yeah but, its quite difficult to choose which ICO will success in the future.
For me its both risky, it really risky. First, trading needs a lot of knowledge and you also need to have analysis every trade that you will do. Second, Investing on some ICO's out there is not that easy. You have to do your own researches about that project before you can invest on it.