Even the world's top billionaires are not immune to investment losses. It is reported that Bill Gates had used his personal funds of $500 million as early as 2022 to short Tesla stock. Subsequently, this position seemed to be continuously increased, with margin added to maintain the position, ultimately accounting for about 1% of Tesla's total shares. However, since then, no further news from Gates himself regarding this trade has been heard—neither a closing announcement nor any further disclosure of holdings. If he indeed has not closed the position, based on recent market trends, this massive short position now faces an unrealized loss of over $10 billion. This once again confirms an old adage: even the smartest investors need to be cautious in the face of the market.