Answer:
If you have it, you want to share it. If you share it, you don't have it.
When you stop and look, you can always see me. If you try to touch, you cannot feel me. I cannot move, but as you near me, I will move away from you.
Some live in me, some live on. And some shave me to stride upon. I rarely leave my native land. Until my death I always stand. High and low I may be found. Both above and below ground.
It flies when it's on and floats coming off.
So cold, damp and dark this place. To stay you would refrain, yet those who occupy this place do never complain.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.