What am I

I belong to every one
but no one can controll me,
they devide me into peices
but they never do consult me.
I always travel forwards
never going back,
even if I surround people
some will always lose my track.
the poorest people always have me
the richest use me up.
I am neither solid, liquid or even gas
so I can't be kept in a cup.


What am I?