I think whatever you need to know about a Formation of bubbles and their burst you can see in the ZM chart:
An 805% move in 18 months followed by an 84% decline in the next 17 months:
During that 84% decline, you see a 36% and 48% positive surge, but the aftermath remained the same..!
Even a significant change in the fundamental did not help:
But ZM...
If you have an investment that has experienced a decrease in value significantly, and you decided to keep and sell at your entry price, please read this article it may help you to make a better decision.
Before we go to the main educational point, keep in mind those who bought tech stocks at the market peak in 2000-2001, waited 15 years to get even..!...