it is mainly up to nature of the person . Someone wants to be and to have wealthy life and another one wants to feel a real life and travel (by that feel happiness) and the other ones care about other people and think about being science and other rest of them be happy by having just what they have .
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I have a wealthy life and I travel much ) maybe there are some borders, but I'm happy with the life I have ) so no need to struggle for me...