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.
Borrowing money from relatives and playing a margin is a mistake. When investing in crypto, absolutely no borrowing money and play very dangerous. As luck would have it, but not everyone has the experience and luck