During the late 1990s, many of the investors are so craze up with hi tech stock such as Oracle, Sun Micro System, Microsoft, Dell and others that are trading in very high PE & market cap.
For those years, investors made good and quick money. And that was the craziest Bull Run throughout the history. However, as the technology stocks crashed, there are investors become deeply in debt due to their greed and speculation. Nevertheless, there are investors who know how to manage their portfolio become millionaire.
Typically for myself, I still use the same old approach to invest in simple and boring businesses that have a good long term prospects. Fundamentally, it has been proven & tested over the historical years.