Devina Mehra, a veteran investor and Chairperson of First Global, has cautioned against the widely held 'buy and forget' investment strategy. In a recent social media post, she highlighted that no theme, sector, or asset class can ensure continuous outperformance. Drawing from market history, Mehra pointed out that the composition of benchmark indices like the Sensex and Nifty has dramatically changed over the past few decades, with financial stocks now dominating these indices, unlike in the past when public sector undertakings were more prominent. Furthermore, she noted that what were once considered 'blue chips' have lost their relevance over time, citing examples of companies that were once leaders but have since fallen from grace. Mehra emphasized that the tendency to focus on successful stocks while ignoring those that have failed, known as survivorship bias, can mislead investors. She urged investors to remain adaptive and recognize that market leadership is cyclical, rather than relying on historical trends to guide their decisions.