Kadena and Bitcoin mining

Hey guys new to the channel. Can someone help me with kadena. i have been mining it and storing it at zelcore. Where can i trade it or sell it?? Also another question. i have a bitcoin miner and i am using dxpool. it constantly keeps dropping in productivity, what is a good pool to join for most profitable mining. if you can get back to me here or my email which is krawiec.mario@gmail.com