This phenomenon is not unique to the recent RobinHood millennials with extra cash and extra money who are bored. There is a tone of condescension against an entire generation of millennials painting them uniquely as jack-asses (the author even uses Jackass to make the point).
Here are some facts.
If a stock like HTZ plummets from $20 to 50 cents in a matter of days, the volatility is so great that when the stock spends a few days at the bottom, a few cents up can be seen as strange. Except it's not. Very few people have the intution to appreciate that percentage returns are a function of the price. If a stock gets hit by 90%, it requires 10 times its value to recover the loss. That is 1000 percent!
This has happened since the earliest days of stock trading. Here is an example with Enron:
https://famous-trials.com/images/ftrials/Enron/documents/enr...
Notice the daily returns from the 3rd of December 2001. So, really, what has been going on forever?