Personally I don't think this is sustainable. Why? Because wages are not going up so the only reason why prices are going up is because lack of demand in the real estate market. So this means that the current prices are only going up due to scarcity.

If 3D printing takes off, we can see the scarcity drop and prices will revert. The only people buying now are those with really high credit scores and plenty of wealth. If this keeps going and I am wrong then houses would only be owned by the super wealthy and most people would be forced to rent from the rich. I don't foresee it going well because it would also mean the wealth disparity would continue to increase.

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