I've gotten more cautious on the spec stocks involving the data center and AI, says Jim Cramer

Core Viewpoint - The investment landscape for speculative stocks related to data centers and AI is shifting, with a notable decline in market performance and a cautious outlook on these sectors [1][2][3]. Group 1: Market Performance - The Dow Jones Industrial Average fell by 798 points, the S&P 500 dropped by 1.66%, and the NASDAQ plummeted by 2.29%, indicating a significant downturn in the market, particularly affecting tech stocks [3]. - There is a noticeable trend of capital moving away from tech stocks, especially those linked to data centers and AI, as investors seek safer or higher growth opportunities [3]. Group 2: Investment Sentiment - The previous optimism surrounding 2025 as a year of "magical investing" for data center-related stocks has been retracted, signaling a shift in sentiment towards these investments [2]. - Concerns are raised about the current market resembling the dot-com bubble era, where many companies were losing money while insiders were selling their shares, leading to a potential market correction [4][5].