You can invest in ICO. But for such investments it is necessary to allocate a small part of its portfolio. Also, do not invest all allocated funds in the ICO. You can leave 50% and try to buy cheaper at the exchange.
Investing 50% in ICO is too much even for seasoned traders. I wouldn't invest more than 15% no matter how promising the ICO is. Most of them fail so it's best to be careful.