Is being selfish a natural trait in all of us?

My mother was watching a video about a millionaire that gave some of his money to help a poor in need.

Meanwhile my mother would spend the money on a brand new car, vacation and other luxuries, my idea is different. I told her that if I were rich, it would be spend on useful purpose in the community instead of expensive things for myself. Those things mean nothing when you die anyways. Besides why do you even need expensive stuff just for being rich?

My mother's reply was mocking me (she laughed) and saying ''and who helps you anyways, does anyone give you money or something'' but my reply was an ''It's not about who helps me, it's not about wanting for something in return but rather feeling good about my myself for making a difference, that I had the chance to help, to spend it on something useful and nothing on worthless materials for myself''.

Is being selfish a natural trait in all of us?
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