RE: Should we derank or continue fight for DEC earning ?

Okay. You are in Bronze 2 which means your earnings are capped as if you only had a rank of 699. If you get our power up to 5000 you'll get better rewards (I'll see if the guild can help you out). Your rank means you are up against other people with similar rank..many would be much higher CP but could also be just like you. My main is stuck in Silver 3 but I battle against Gold 2.

My suggestion. Don't derank. Keep battling and winning. BUT.. only battle until you hit 75% then take a break. No sense wasting your time and getting only half rewards.