Index funds have beaten most active managers for years, but I keep wondering if the passive wave has pushed stock valuations in sectors like tech too far from fundamentals. When everyone buys the same top holdings through ETFs, aren't we just creating a bubble that active investors could exploit? I've seen my own portfolio swing wildly with the S&P 500 despite diversifying across sectors. So, is passive investing in stocks really the safer bet, or are we ignoring the risks of crowding and market distortion?