IOTA : While internet of things improve this coin will be unstoppable.
WAVES : Because of dex.
XMR/ZEC/KMD : My favourite is Komodo udervalued. Privacy untraceable.
XLM : Because of IBM. Undervalued.
NEO/GAS/RPX : Because of China.
BCH : I think its still undervalued. But you should buy the dips. Sell at resistances.