Answer:
lighter than feather and softer than silk yet the strongest man in the world cannot hold me for more than a few minutes.
I make billions of dollars selling windows. Who am I?
What has a ring but no finger?
you can throw me away but I will always be coming back
I reach for the sky but clutch to the ground. Sometimes I leave but I am always around.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?