I never considered my house as an investment. I got a 15 year mortgage, paid it off in 7 or 8 years. I have no idea nor do I care how much it would sell for now. I live here, it’s my home, not a savings plan. My wife and I and the tax assessor own it.
In Atlanta it wasn’t uncommon 5 years ago for two yuppies to buy a $1M home interest only. Monthly payments were high but deductions,etc. markedly reduced. They banked on being able to sell that $1M house for $1.25-1.5 M 5-7 years later and net a tidy profit. Then prices tanked and they are screwed - their homes won’t even sell for 750K or 700K in some cases.