Vericoin (VRC) is my number 1 pick right now.
It is a POS coin with an awesome technology, and a market cap of just $30m. It's flying under the radar even though it's listed on Bittrex.
I second this, I used to be a devoted Vericoin holder. I would also like to mention that they have a binary blockchain vision with Verium. It's POW rather than POS and is asic/gpu resistant, whats so great about it is it can be merge mined with Vericoin so it speeds up vericoins blocks.
Vericoin is like the cash and verium is like the digital asset, also they have a 3rd party developer working on an app called incentify where the in app currency will be vericoin.
Disclaimer- I own no vericoin at the moment but I know that it's a legit project and could do extremely well in 2018.