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 my opinion, it is better to make your own research and trust your guts.
The most of the privacy coins are undervalued right now.
The best opportunity is to find a privacy-related project with a low total supply (less than 100M), that way the price will be increasing much faster.
I recently found one project called Ethereum Meta, it is related to anonymity and untraceable transaction. They have a very interesting project to build the Anonymous E-Market Place.
They are on Pre-ICO stage right now, you can check their website: https://ethermeta.com/
Or even better go through their Bitcointalk thread: https://bitcointalksearch.org/topic/future-of-privacy-ethereum-meta-foundation-of-anonymous-e-marketplace-2659058