Answer:
You shoot me but I don't die. You hang me but I don't die. What am I?
I wonβt break if you throw me off from the highest building but I will break if you place me in the ocean.
Two in a whole and four in a pair. Six in a trio you see. Eight's a quartet but what you must get is the name that fits just one of me.
I am quick when Iβm thin. I am slow when Iβm fat. Wind is my worst nightmare.
If you have me you want to share me. If you share me you don't have me. What am I?
No matter how little or how much you use me, you change me every month.