Answer:
What do people spend a lot of money on every year but never want to use it?
Its days are numbered.
I can be found in seconds, minutes and centuries, but not in days, years or decades.
I look at you, you look at me, I raise my right, you raise your left
Which is the oldest tree?
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard. Who am I?