iPhone 5 or the long wait?

Hey guys, so here`s the deal... I live in Brazil and as an article from the Verge recently showed, iPhones and apple products in general are FREAKIN` expensive here.

With that said, I'm a happy owner of an iPhone 4, but it's time to buy a new one, my question is: Should i go for the iPhone 5, or should I be a calm, sane and balanced human being and wait to buy the new model?

Thanks guys!