Answer:
It is something you make after you've weighed your options.
No sooner spoken than broken. What is it?
What dentists battle on a daily basis
Inside a burning house, this thing is best to make. And best to make it quickly, before the fire's too much to take.
What is so delicate that saying its name breaks 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.