Just read the whitepaper and study and research more about the ICO and look for more information about the developers. Good coins are popping out sometimes, you will be shocked that there are coins that is super good and makes you a huge profit.
there is nothing impossible, because I can even give an example of PundiX, through which people earned a lot of money. to make a choice for such a company, you need to either know the real prospects of this project, or rely on your intuition.