Interesting question. Ive mentioned before i read this famous book on the expat community living in Paris in the 20s. the author describes how it was basically coming to an end anyway for the types who had moved there and that boatloads of mainstream americans were pouring in to visit and experience the fun they had heard and read about, however, the economic crash put that to an abrupt end and everyone was soon back home.
I think different types are coming here today than came in 2002.
I think most will find the soaring prices a reason to pick up and leave (i just got back from the usa and im in shock about how much more i pay here than back in usa just 2 months ago). Also, the streets choked with black pollution pouring from the never inspected trucks, busses, taxis, etc. with tailpipes pointed at the sidewalk, at us!
In short, the quality of life is so much lower than back home. we dont live well here.