It is super risky, but there's a definite path to profit here: the short-sellers sold too much stock. 140% of the shares, it appears, which means shares were borrowed, sold, and then borrowed from the buyer it was sold to and sold again. And when all those shorts run out, the short-sellers need to have bought shares back again. With share prices this high, they're going to have to pay a lot of money for them, and people holding shares could make a ton of profit.

But it's definitely risky. You could lose a lot of money. Many of the people buying are also doing it to stick it to the hedge funds and give them a taste of their own medicine.