You will need people more than you would ever need money in this life... I know this by experience and that's why I will never trade friendship for one-off materialistic gain, when we can continue to be friends, grow together and benefit from our diverse perspectives. Look around you, and you'd notice success is a function of the quality of your network. I've been around long enough to know this; what goes around comes around. That friendship you sacrificed for selfish gain will be in the future, at the gate of one of your biggest breakthrough and only its "YES" is all you'd need to make it through!