This is only my personal opinion - But i think that ARK still has some good growth and profits ahead... There's a big amount of backround dev happening with them and I think that they are one of the more usable cases of products/coins out there.
My thoughts as well. I think 2018 will be a good year for ARK.
ARK is 2nd biggest in my portfolio because of this belief. I also hold some LISK but not nearly as much.
As many said though, both are good and stable compared to many alts out now.
I actually haven't bought any ARK yet (sadly) but depending on the price, I will definitely be buying next week once I get some money in from a job that I did recently...