While I wish the coin would get to 100$ or more and while the coin has indeed fallen a lot from its ~15$ peak, I want to remind you it was even 0.6$ or so at some point.
Just to make sure your calculations are accurate and the "low" numbers are correct.

I was thinking about buying more XMR, but I am still undecided. Because there's still plenty of room to fall  



I wish I could be as confident as you are!