No, just good old fashion buying. If you wanna be a stickler sure technically I haven't realized all those gains yet and only meant in aggregate my pins investment (unrealized) is up significantly in a short period of time.
Real estate is simple supply and demand. The supply into the bay is basically fixed. Ipos mean liquidity for thousands of people even if all the prices fall in half there will be significantly more money available with folks looking to diversify and invest. How much is impossible to determine but the chance that billions of new dollars will be created and none will be diversified or spent is 0.