It's laughable that no one considered that the most you can profit from short selling is 1x of the amount you used for short selling.
To illustrate, if the trader has $1,000 in his account and wanted to use 10x leverage - $10,000 - to short something priced at $100, then the highest amount the trader could take profit is $10,000 IF the coin crashed to zero. The only reason why there's a potential to profit 10x of the original capital is because of leverage, NOT because there's an exponential return.