令我们亏损的不是行情，而是投机取巧心

Core Viewpoint - The article emphasizes the importance of maintaining a cautious investment strategy, particularly in the high-tech sector, and highlights the risks associated with investing outside one's expertise [4][5][6]. Group 1: Investment Strategy - The author holds a portion of technology stocks, achieving significant gains, such as a 130% profit from Jinfatech and 70% from GoerTek, but these holdings only represent 30% of the total portfolio [4]. - The investment philosophy is centered around the idea of having a "retreat" or exit strategy, allowing for more confident decision-making in volatile markets [5]. - The author recounts an experience where a colleague's aggressive trading strategy led to significant losses, illustrating the dangers of not having a risk management plan [6]. Group 2: Technology Sector Insights - The article discusses the disconnect between American AI companies and the Chinese AI chain, suggesting that this could lead to a fragile business model for U.S. AI firms, which rely heavily on inter-company investments [6][7]. - Despite the impressive performance of companies like Nvidia, there is skepticism among investors regarding the sustainability of profits in the AI sector, as many companies are not yet profitable and continue to incur high expenses [7]. - The current enthusiasm for high-tech stocks, particularly in AI, should be approached with caution, adhering to the principle of "better to miss out than to make a mistake" [7].