The one problem with every Ponzi scheme is that it must constantly grow, in both demand and supply terms, for the mass delusion to continue. The other problem, of course, is that every Ponzi scheme always comes to an end.... which may have just happened in China where as the chart below shows, as of this moment at least, the supply side to the Chinese housing ponzi (and recall that in China the bubble is not in the stock market like in the US, but in housing) has slammed shut.
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Source: BofA