Harshad Mehta scam showed unchecked speculation and greed can trigger devastating market collapses..Ketan Parekh era proved overexposure to single sectors magnifies investor losses severely..Global crisis of 2008 reminded investors that Indian markets mirror global economic tremors..COVID-19 crash revealed black-swan events can erase wealth overnight despite strong fundamentals..Every crash proves long-term discipline and patience outperform panic-driven exits and short-term fear..Read More Stories!