As a faceless person on the internet, I welcome the opportunity you are giving all of us to access your wallet and dictate to you just how you should spend the hard earned money you make.
No, it's not wrong. In fact if you want to buy 10 or 20 of these iPhones go ahead. You aren't spending any of my money (sorry I am not giving you reciprocal access to my wallet).
You have my permission to spend your money on this.