Although ICOs are huge and there's massive potential form making a killing it's still a massive risk. It's sort of like buying a lottery ticket. If you know how to understand the value, or potential value of an ICO you might at that point have a chance of making money from it! You need to know what the project is about, who the team are, ensure they actually have a working model and it's not just an idea and you also need to read and understand the white paper. Check social media outlets to get a feel for it too. It's a lot of work. And you're doing that for each ICO you come across!