I wonder. Given that the market is sooooo sure that house prices only go up, how much is insurance for that? What does a guarantee that I can sell my house in 1

I wonder. Given that the market is sooooo sure that house prices only go up, how much is insurance for that? What does a guarantee that I can sell my house in 10 years for the current price cost? Or how about a guarantee that the mortgage is fully paid off if the house is sold, even if the sale price is below the remaining principle? If that were, say, another $100 per month, while guaranteeing no loss in equity for me, that could be worth it.