Answer:
What is so delicate that even mentioning it breaks it?
What is always coming every day, but never arrives until the next?
I can be as thin as a picture frame but my insides have many things you can see.
What time of day, when written in capital letters, is the same forwards, backwards, and upside down?
What travels from coast to coast without ever moving?
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.