Answer:
If I have it, I don't share it. If I share it, I don't have it. What is it?
What has a mouth but can't chew?
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.
I run through hills. I veer around mountains. I leap over rivers. And crawl through the forests. Step out your door to find me.
Salty water everywhere but not sea in sight.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?