I would advise to extend the loan or try to borrow from friends/family first.
But if you REALLY want to risk it. use the $200 on super high leverage on Bitmex.
If you are lucky you might make that $5k but its super super risky and chances are
you will lose that $200 more often than not.
I would not recommend using this approach, but in this case, this is the easiest way to make a profit, and I am sure that only 2% of people will be able to make a huge profit. Most trading on Bitmex is sure to cost you more and Bitmex is very much like gambling