Tell me your hobbies so I can tell you why you are a piece of shit for pursuing them.
Exactly.
The common belief is that people buy expensive cars to flaunt their wealth to others in order to draw attention to themselves. If your reasons are different, then I would like to hear what they are. Simply saying that you like expensive cars is a cop-out. There are usually psychological reasons for preferences. Clever marketers are familiar with these tendencies and are well poised to capitalize on them.
I already directly offered you one, Disco directly offered you many, and many more have been stated throughout this thread.
Furthermore, your arguments have repeatedly been shown to be incredibly weak.
What you have called the "common belief", regardless of whether you are accurate in assuming that this is indeed a commonly held belief, is totally irrelevant, as the supposed fact that many people believe this does not entail that an individual who purchases a "nice car" has actually done so for the reasons propounded by this "common belief".
I don't usually care to point out when people commit informal logical fallacies, as their use does not necessarily make an argument any less true, but, in this circumstance, it does, so I will state it: what you have done is make an argumentum ad populum, which, to be honest, is one of the most see-through and weakest arguments you can make.
As I said before, everyone intelligent person who reads this thread will see that all you are doing is attempting to force your subjective value judgments on other people, under the guise of supposed "rationality".
This is why I said, at the very beginning of this argument, that you seem to have severely underdeveloped Fi (the need to force your own subjective value judgments on others is one of the most obvious characteristics of underdeveloped Fi), but, even more worrisome is the fact that, as an INTJ, your inability to see the severe error in your reasoning, seems to stem from an apparent inability, at least in this case, to see the matter from another perspective, which would be a strong indicator of underdeveloped Ni. As a supposed Ni-dom, this is rather disconcerting; if I were you, I would question whether I'm actually an Ni-dom; furthermore, if you indeed are, I would ask myself what I need to do to better develop my dominant function.