It seems that more technologically advanced coins such as DAG-based cryptos (Byteball, IOTA) and privacy-oriented coins (Monero, Dash, Verge, DeepOnion) and getting increasing attention lately, so I would focus on those in the following year. My bet also is that Waves will attack some top market cap positions when all the promised upgrades are implemented.
Byteball and IOTA are indeed good choices as they solve most problems of blockchain coins... free or very cheap and fast transactions is what Bitcoin is really missing.
From the provacy coins, I'd go for DeepOnion. I'm not saying it's better than the others, but at least it's similarly good and it's market cap is only about $30 mil., while the others have already hoge market cap. DeepOnion thus have much bigger space to grow and can make much higher profit.