https://finance.yahoo.com/quote/CSCO/
I knew people who purchased their options but didn't sell and based on the AMT (Alternative Minimum Tax) had tax bills of millions of dollars based on the profit IF they sold on the day they purchased it. But then it dropped to $10 and even if they sold everything they couldn't pay the tax bill. They finally changed the law after years but those guys got screwed over.
I was young and thought the dot com boom would go on forever. It didn't. The AI bubble will burst too but whether it is 2026, 27, 28, who knows. Bubble doesn't mean useless, just that the investors will finally start demanding a profit and return on their investment. At that point the bubble will pop and lots of companies will go fail or lose a lot of money. Then it will take a couple of years to sort out and companies have to start showing a profit.