Last Mishna in Horayos, “???? ????? ??? ???? ???? ???? ?? ????.”
Wolf, you can’t be serious. Every person is infinitely valuable. Every choice you make has the potential to determine the fate of the entire world. Not to mention that, as LU pointed out, you are not worthless but invaluable to your wife, children and friends. To the people whom you hold most dear, your own worth can not be overstated.