Right now - CNX.
You must have noticed that I strongly support it Why?
1. CNX coin shows great growth potential
2. Introduction of new technologies (I think they'll make cnx increase much in a short term): Cryptonex team has staerted to work on hardware wallets, p2p platform and mobile app are almost ready
3. pos mining gives me 12% annually just for keeping my desctop wallet online - not bas for an additional profit to coin price growth
I stick to it!