Answer:
If you have it, you donβt share it. If you share it, you donβt have it. What is it?
In my life I must bare, my bloodline I must share. What am I?
Take it and you will lose or gain more than the others.
I like to twirl my body but keep my head up high. After I go in, everything becomes tight. What am I?
You find me behind the stars; or in a sixth seventh or third. It takes something round a computer and me to make pie. I am bigger than anything you can think of.
Give it food and it will live, give it water and it will die.