I would say LRC, LMC and XAS all three are chinese coins which have potential to grow massively in 2018.
Different can be of different choices here, but my choice is to choose Etherium, I think Etherium price is still very low, and it has more chances that its price will increasing more and more and it can even boost in 2018. Therefore i think the best choice here can be to choose Etherium as compare to any other atlcoin.