Hopefully this isn't behind the paywall. Interesting article in the New York Times regarding Robinhood with a couple of staggering statistics.

Robinhood Has Lured Young Traders, Sometimes With Devastating Results
Its users buy and sell the riskiest financial products and do so more frequently than customers at other retail brokerage firms, but their inexperience can lead to staggering losses.
https://www.nytimes.com/2020/07/08/technology/robinhood-risky-trading.html

Some of the more interesting statistics.

"In the first three months of 2020, Robinhood users traded nine times as many shares as E-Trade customers, and 40 times as many shares as Charles Schwab customers, per dollar in the average customer account in the most recent quarter. They also bought and sold 88 times as many risky options contracts as Schwab customers, relative to the average account size, according to the analysis."

...

"For each share of stock traded, Robinhood made four to 15 times more than Schwab in the most recent quarter, according to the filings. In total, Robinhood got $18,955 from the trading firms for every dollar in the average customer account, while Schwab made $195"

At least he got it up to a million at a point. Should've learned about trailing stops?