Cisco Systems has never recovered it's March 2000 price and may never will

This is a warning about buying stocks during a speculative bubble. Cisco Systems is a profitable company. But it has never recovered it's March 2000 price, when it reached $82 a share during the dot.com bubble:

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Even the 2021 bubble wasn't enough.

Twenty-two years later after the dot.com bubble, the share price is half it's all time high.

This is a warning from history - shares like Facebook/Meta which reached their all time high in 2017 may never recover either, though they will generate steady profits.

The moral: don't buy during a bubble.