I just read an interview with Munger that touches on a really important point for long-term investors. He basically says something that many people don't want to hear: if you can't stay calm when your portfolio drops 50%, you're probably not cut out to be a serious investor.

Munger emphasizes that these 50% swings are not exceptions but part of normality when you hold stocks for decades. Once or twice every century, the market will really test you, and that's when you see who truly has the grit and who doesn't. It's not just about technical skills or reading charts; it's really a matter of mindset.

What strikes me about Munger's reasoning is that he distinguishes between those who achieve mediocre returns and those who can really do well over time. The difference isn't in forecasting ability but in the ability to stay calm when everything crashes. It's almost philosophical, if you think about it. Market fluctuations are as inevitable as the laws of nature, and investors who can emotionally manage these moments are the ones who reap the rewards.

Basically, Munger is saying that true strength isn't in technical analysis but in mental serenity. It's that calmness that allows you to see opportunities where others only see fear. And in his view, this is the real foundation for achieving extraordinary returns over time. It's not about luck; it's discipline and mental strength combined.