This article discusses the relationship between power and self-confidence, highlighting how excessive self-confidence can lead to destructive decision-making. Four experiments were conducted to show that power-holders tend to reduce their loss aversion and anticipate higher gains, leading them to make riskier decisions. The results also suggest that individuals with more power are surrounded by greater rewards and are less concerned about the consequences of their actions. Additionally, over-confidence derived from position and power can lead to destructive leadership qualities, resulting in poor decision-making, lack of vision, and ineffective planning.