Answer:
What is always coming but never arrives?
This is a shape and a symbol that we literally cannot live without. What is it?
It keeps you on the ground and stops things from floating around. What is it?
What can touch someone once and last them a lifetime?
Something you carry while singing.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.