the STRATIS will trade on poloniex?

may be very soon

stratis is the most successful coin so far if you study from the past 2-3 months
Agreed is one of the most successful ICO recently, but people need to understand Poloniex do not list o coin without full nodes, The full nodes must be launched first. You can ask Waves team that thought that raising over 30000BTC is enough to be on Poloniex. It is for security reasons. According to Stratis roadmap the full node should be ready by December.