Percentage gains of Dash wont be as big as PIVX or SmartCash. I actually sold all of my EOS for STEEM some time ago as I'm already using this platform. Dash is my favorite "Currency". I think it's the best we've got at the moment. But that doesn't mean I'm going to HODL it. Investments are not about playing favorites. It's about ROI (as long as NAP is preserved).
Tron is certainly having a massive bull run in the coming weeks. Same with EOS. Dash will follow a little later.
Go for PIVX. They are also very small and They have a far better project than SmartCash. They are the first POS Zerocoin implementation and their roadmap is rock solid and they have a great vision and they rip off so much from Dash. Their mining decentralization is crazy good. PIVX also has some very well done marketing.