How Much is the Kioh Lung in the Window?

Well... you have to do what you enjoy. If you like what you're studying (if not necessarily the studying itself, of course, but the feeling you get from learning the material and the subject in general) you should stick with it - the long term rewards of self-satisfaction of completing it, and the career options having a degree, will be worth it. (Physics has plenty of applications outside basic research - it is a very employable field, from what I undersand.) Of course, you don't like it, then it's a purely economical decision of whether putting up with classes and tuition is worth the degree.

And... yikes! You didn't seem like the maniacal supervillain type...