You can invest in crypto because it gives you fast profits. And you should invest in altcoins such as ETHEREUM or LITECOIN, because at present Bitcoin prices are quite high, while the altcoins are still at relatively normal prices. For ICOs, it is important to find out what good ICOs to invest in, because there are so many ICOs right now, and you only get a profit at the end of the ICO whether it is successful or not.