Answer:
Do you know what you can hold without ever touching it?
Who spends the day at the window, goes to the table for meals. And hides at night?
A hole leading in, a hole leading out, we connect to a cavern that is slimy all throughout. What are we?
Voiceless it cries, wingless flutters, toothless bites, mouthless mutters.
It's in your hand though you can not feel it. Only you and time can reveal 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.