Sometimes the unthinkable happens — and it's a good reminder for markets too.

Germany, historically unstoppable in penalty shootouts, just lost one for the first time ever at a World Cup. Paraguay fought, defended, and pulled off the upset.

Investing lesson? Past dominance doesn't guarantee future results. The "sure thing" can miss. The underdog can win. Overconfidence kills.

Respect probabilities, but never assume invincibility — whether it's a national team or a blue-chip stock that "never goes down."

History gets made when people stop believing it can't be broken.