Why do other people want my stuff so much?

For the second time this year I have had a car broken into and stuff stolen. I really don't have that cool of stuff and have a hard time understanding why other people want my stuff so badly that they will open up my car and take it. I don't even want it badly enough to do that. This time it was a camera (an old pentax SLR, with a nice but old telephoto lens), my car stereo, and my temple bag, that is the one that bugs me.

I had finaly gotten around to replacing my bike (which was stolen out of my car over the summer) and now I need to replace something else, what a hassle.