Answer:
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.
Two people are born at the same moment, but they don't have the same birthdays. How could this be?
Who is it that rows quickly with four oars, but never comes out from under his own roof?
A time when they're green. A time when they're brown. But both of these times, cause me to frown. But just in between, for a very short while. They're perfect and yellow. And cause me to smile.
If you break me, I do not stop working. If you touch me, I may be snared. If you lose me, nothing will matter.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.