The five most dangerous words in business are: Everybody else is doing it.

When the crowd decides for you

We all feel the pull. Everyone's jumping into cryptocurrency, or remote work, or the latest marketing trend. There's comfort in numbers—if smart people are doing it, it must be right, doesn't it? But Buffett's warning cuts at something deeper than just avoiding herd behavior. He's pointing out that following the crowd is how mediocre decisions get made by otherwise intelligent people. The moment you stop thinking independently and start thinking "well, everyone else," you've handed your judgment over to people who also might not be thinking independently.

What makes this so sneaky is that it doesn't feel like a mistake while it's happening. It feels safe. Reasonable. But in business and life, that consensus often forms around the easiest path, not the best one. The stocks everyone's buying are often overpriced. The strategies everyone's copying get commoditized quickly. The real edge—whether you're running a company or managing your own career—comes from asking the harder questions: Why are they doing it? Does it actually work? Is it right for me specifically?

The invitation hidden in Buffett's five words is to get comfortable being slightly out of step, at least long enough to think clearly before you join.