Mark Cuban, the billionaire entrepreneur and prominent investor on the television show “Shark Tank,” has candidly acknowledged the challenges inherent in startup investing. Despite investing nearly $20 million in approximately 85 startups through the show over the course of over a decade, Cuban admitted that he is currently at a net loss across these investments.
He stated, “I’ve gotten beat,” which highlights even with his prior business experience, his capital, his connections, all the time he spent analyzing and helping to build these companies, he’s gotten it wrong. Not just on a deal or two but over the course of a decade plus.
The good news is, you don’t need to be a billionaire or have billionaire connections to be an extremely successful investor. In fact, it can often work against you. The investment arena is littered with wealthy people who have lost a ton of money because their ego got in the way.
Charlie Munger said, “Smart people aren’t exempt from professional disaster from overconfidence. Often, they’re the victims of it.”
Munger has often emphasized that success in investing (and life) doesn’t require genius-level intelligence but rather discipline, humility, and the ability to recognize and stay within one’s “circle of competence.” His partner, Warren Buffett, famously echoed this sentiment, saying, “You don’t need a stratospheric IQ to succeed. A temperament that avoids big mistakes and an ability to stay calm under pressure are far more important.”
In 2019 he stated that he would prefer to hire someone with, “an IQ of 130 who believes it’s 120, rather than someone with an IQ of 150 who thinks it’s 170.” This perspective emphasizes the value of humility and self-awareness in assessing one’s capabilities.
Munger’s wisdom points to the idea that having a high IQ can actually become a liability if it leads to arrogance or overconfidence. When someone believes their intelligence is higher than it actually is—or even if it is high but they over-rely on it—they may ignore critical risks, dismiss other perspectives, or take unnecessary gambles.
Ultimately, Munger reminds us that self-awareness, a grounded ego, and a willingness to learn are far more valuable than raw intelligence. Recognizing the limits of one’s abilities is critical for sound decision-making, whether in investing or any other pursuit.
What might the World’s Most Interesting Man have to say about all of this?
He might say something like this,
“I don’t always know everything, but when I don’t, I make sure to learn. Stay curious, stay humble, and never let your ego do the thinking.”
-Paul R. Rossi, CFA