Jim Cramer, the host of CNBC's 'Mad Money', has advised Nvidia investors to brace for potential 'turbulence' in the stock market. Cramer highlighted Nvidia's critical role in the technology sector, stating, 'Nvidia’s the linchpin of this group, and the pin is failing.' While he did not predict a specific decline in the stock price, he emphasized the importance of being prepared for volatility, especially given the recent downturns in the tech sector, particularly affecting companies involved in artificial intelligence.