It has not doubled in value. The money has lost half its value. Aging real estate does not become more valuable. This is a fiat trick. The demonitization of real estate is going to be cataclysmic for the US because ppl think their sticks and sheetrock homes are getting more valuable. The underlying land may be more valuable as a scarce commodity but the b
House itself is a liability that costs you money on am ongoing basis. 

That being said. I have a mortgage and prefer it to renting. But i also pay no property taxes on the bome and first acre and locked in a 2.25% 30yr fixed mortgage. It would take a lot to convince me to move. Plus, i like my neighbors for now.