if u never get promotion or start a "small" business, then have a degree or not is not a big deal.
it will eventually be a barrier once u get to the higher level.
so do it when u are young, it help u go up easier and it's easier to study when u are young
it is not a guarantee of success, but proved u capture certain ability / knowledge
it also give u a choice of going higher education.
it totally another world, u will find lot's of yr classmate are in upper management level, then this is yr time to know "someone"