The experience of losing $10 is more painful than the joy of finding $10. This is called loss aversion and is human nature. The ratio is different from person to person but the curve of indifference is weighted about 2 to 1 for foregone gains against realized losses.
<aside> ➡️ Curve of Indifference: losing $10 you already have hurts about the same as a missed opportunity for a free $20.
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