Answer:
Big as a saucepan, deep as a cup, Even a river can't fill it up. What is it
Noah survived one and it was great
Timid or weak people are said to not have these.
What has a head, a tail, is brown, and has no legs?
Most people need it, some ask for it, some give it, but almost nobody takes it. What is it?
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.