No one considered that the most you can profit from a short position 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.
The OP said that it might be easier to make 10x shorting. well, I think he really hasn't gotten into trading yet. Even when we get 2x profits when short, it is a very good thing. it's not as easy as the OP said. in fact, it takes persistence for it, it's not even easy to get 2x when going short. In addition, many people who target short, get stuck and end up holding on long term because the price of the coin they are buying has dropped drastically. Imagine making $10k, with $1k in a short amount of time. well, I think if it was that easy, nowadays people tend to prefer trading over investing.