I advise you should not invest in ICOs at the moment. Why do i say that? You can easy see that 95% of people who is investing ICOs now is losses even investing in good ICOs which have good projects behind. But in fact, you can't buy the best ICOs because all token of them will be sold in private sale and pre-sale that you need a lot of money to join, not public sale. ICOs which sell in public sale, is usually bad project.
The best you should buy altcoins which belong top 10 because the price of them now is very cheap.