So basically it's a way to double down on your investments in a single stock. Nvidia goes up... you earn twice as much (I'm over simplifying), but when it goes down, you lose twice as fast. It's for those with a high risk desire... no thank you. I used to be more involved with stock trading (and did pretty well... by getting lucky with timing), but I have long since moved back to just investing in basically the S&P index. Nearly impossible to beat that over the long term.
And the article mentions YOLO... I feel like those who use that don't understand the real meaning of it, or in other words, YODO, too.