I would look at coins that have an existing product, like Fuzex, BAT, Pearl, COB, etc. There have massive upside potential.
I trust much more these altcoins, which have been used on the market for years. I am speaking about Monero, DASH, Litecoin. I also love TRON, Lisk, Ontology. Recently, I added to my portfolio OmiseGO and Credits.