A guy in my neighborhood has a car that looks like that. I feel sorry for him that he probably paid money for it, but I also feel bad for him like maybe he has some attention seeking or other issues, but I also feel like he's an idiot. How am I supposed to feel about it?
I have a friend who is simply into optics and specifically reflectivity, i.e. mirrors. He has told me on multiple occasions that if he could be bothered he would mirror or disco-ball his car, just for yuks.
Some people are into that kind of thing for no specific reason at all, it seems.