The only houses I've seen decrease in value are custom mansions in the $10m+ price range. It's similar to custom cars. People with that much money for a house are likely to build their own.
In the $500k-$5m range I don't see any houses losing value. At least not on any significant scale. Given a 30 year time period, and no other outlying issues (oops, your house is in a liquefaction zone), your house is going to increase in value.
Not necessarily in real money terms. Population isn’t growing much, and if there isn’t a massive money pump pushing down interest rates running (which is getting turned off shortly), the math gets a bit grim.
Most if that appreciation is due to the steadily loosening standards since the early 80’s when a similar inflation spike drove up interest rates and gutted the housing market.