HGT (Hello Gold). Market cap is very low and if gold price rises (which will be the case once the world economy cools down), HGT will highly profit as it is somehow backed by real gold. It's always good to have some gold backed tokens in your portfolio but I wouldn't put all my money into it. It's also smart to buy a privat coin like XVG (Verge). They have a strong community and active development. Private coins could be the big winners in 2018. No guarantee of course as no one here has a crystal ball.