yeah, I would borrow crypto currency but only for high price. It is like I make a short position, I owe crypto for high price and pay back for low price. As a result I earn on this deal
This is genius answer 
You can always borrow crypto just for short selling and make profit from them, But how would you deal with the interest? It's okay if you always know where your crypto will move, but if you don't.. you will just make it worse.