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.
One can simply not hold if they are trading in futures, they will either get profit or get liquidated if the market moves in the opposite direction based on what leverage they have selected for their trade, so it's obviously not easy to get 10x in futures trading, even the ones who are experts of the market tend to lose money when it comes to short futures trading because it is very difficult to perfectly time the market in these kind of situations.
Futures trading is basically not for users who have no knowledge or experience at all, newbies need to stay away from futures trading because they will easily lose all their capital in no time if they just get influenced and start trading futures so that they get a lot of profit in a short period of time.