I just noticed something that many investors seem to be overlooking right now. On November 20, 2025, the Nasdaq dropped over 2% in a single day, and CNN Business's Fear & Greed Index was at only 7 points—extreme fear everywhere. Immediately, headlines started talking about a new AI bubble. But honestly, when I look at the current market dynamics, I can't help but think of something much older: the dot-com bubble of the late 1990s.

Do you know what happened back then? The internet was celebrated as the solution to everything. Companies simply added ".com" to their names and watched their stock prices explode. Venture capital flowed in endless amounts into even the most dubious startups. Valuations were completely detached from reality—companies with no revenue, no profit, no clear business model were valued in the billions. Traditional metrics like price-to-earnings ratios were dismissed as "outdated relics."

And then came 2000. The Nasdaq lost nearly 78% of its value over the next two years. Thousands of startups disappeared overnight. Cisco, once the most valuable company in the world, fell so drastically that its all-time high of $82 from the bubble era has never been reached again—more than 25 years later. The dot-com bubble destroyed trillions in wealth and left countless investors ruined.

Here's the interesting part: not all companies died. Amazon and eBay survived because they adapted their business models, focused on operational efficiency, and actually pursued profits. They showed that transformative technologies can indeed endure—but only if built on solid fundamentals.

Now I look at today's AI euphoria and see frightening parallels. The same story is circulating again: "But this time, everything is different." That's exactly what they said in 1999. Nvidia is interesting because—unlike Cisco at its peak—it actually generates massive cash flows and has real demand. But if expectations detach from realistic long-term returns, even strong fundamentals can be overshadowed by speculative excess.

The lesson of the dot-com bubble is timeless: cash flow, profitability, and practical utility matter more than stories. FOMO and herd behavior repeatedly drive markets to extremes. And yes, world-changing technologies can experience world-changing corrections when expectations run ahead of reality.

When I evaluate today's situation, I believe discipline and skepticism are essential. The dot-com bubble was not just a warning against inflated valuations—it was a turning point. Today, investors must be able to distinguish between groundbreaking opportunities and speculative excesses. That’s difficult, but necessary.