The actual reason this is stupid is because the value of your house isn't really the market value, it's the use value. If you own two houses then the rental and resale values are relevant, but the only way to take advantage of inflated prices on your first house is if you're downsizing - otherwise the extra money you made on the sale becomes extra money to pay for your new house.
The actual reason this is stupid is because the value of your house isn't really the market value, it's the use value. If you own two houses then the rental and resale values are relevant, but the only way to take advantage of inflated prices on your first house is if you're downsizing - otherwise the extra money you made on the sale becomes extra money to pay for your new house.