there are no harm in having a desire but excessive desire become harmful
Answers
Selfish and excessive desire is widely considered immoral, a violation of natural or divine law. For example, “avarice” is one of the seven deadly sins in Catholicism (avarice: pleasing oneself with material acquisitions and possessions instead of pleasing God). And according to Buddhism, “craving” is a fundamental hindrance to enlightenment (craving: compulsively seeking happiness through acquiring material things).
As with the opposite chief feature of self-destruction, greed stems from a basic fear of life. To be exact, greed is driven by a fundamental sense of deprivation, a need for something that is lacking or unavailable.
When this feeling of lack is particularly strong, a person can become utterly fixated on seeking what they “need”, always trying to get hold of the one thing that will finally eliminate the deep-rooted feeling of not having enough.
That one thing could be money, power, sex, food, attention, knowledge … just about anything. It could be something concrete or abstract, real or symbolic. But it will be something very specific on which the entire need-greed complex becomes fixated.
Once that happens, life becomes a quest to acquire as much of it as possible.