Answer:
I never was but always will be. No one ever saw me but everyone knows I exist. I give people the motivation to better themselves everyday
I help engines spin and pants stay up
I get paid to shoot people then blow them up.
I start in little but I end in full you'll find me in half and complete.
My rings are not worth much, but they do tell my age. What am I?
A little house full of meat, no door to go in and eat.