Neo's been holding fairly steady since all the dust settled from the China ban on ICOs etc. I expect we'll see more organic growth in 2018.
I believe it has good chance of being $500 next year. Because hundreds of ICO's are coming to NEO in 2018. And I believe they'll have similar impact on the price than they had on ETH last spring. There's about half less NEO tokens in circulation than ETH. So NEO being $500 is about the same as if ETH were $250. I think it's not too realistic prediction.