Holding Bitcoin in itself is making the world a better place. You are voting with your wallet so to speak, against the old corrupt monetary system, and for a more honest and fair future.

Whether the holder feels greedy about it or not, well that's the holder's problem. I think it might be unhealthy to feel too much greed. Might be better to take things only half seriously. Laugh when the price goes up, and laugh when it goes down.