I don't know about rich in 2018, but if you are willing to invest in noteworthy projects then you will be assured returns as they are built and they grow. Even though ICOs are tricky to predict, if you are willing to invest long-term (1.5 yrs) then placing your trust in solid projects like Rentberry and even the upcoming Arcblock can have great returns in the long run.
In theory only the good projects will be able to give you any kind of profits but that is not the way to market works there are many scam icos that have generated great profits for a lot of people when the price pumped and that is because people do not really care about the long term availability of a project they only care about profits and this makes predicting what coin is going to make you a profit even more difficult.