If my house value falls, broadly speaking, other ones fall. If my house value raises, broadly speaking, other ones raise. Buying a house means, generally spea

If my house value falls, broadly speaking, other ones fall. If my house value raises, broadly speaking, other ones raise. Buying a house means, generally speaking, I can kinda "guarantee" I can afford that "quality" of house. It's like having a housing share that I can exchange for another similar house.