Answer:
What is the difference between a poorly dressed man on a bike, and a well-dressed man on a unicycle?
I travel in a gaggle.
Many people own a copy of me. Without me the world would fall.
Although I am still, in families I run. I continue to live on in a living one. As one continues to draw breath, I will not rust. However, when one stops drawing breath, I will become mere dust. What am I?
I stink in living but when dead smells good.
What never gets any wetter no matter how hard it rains?