> "Once housing -stops- appreciating in value in an area, people stop building additional housing in that area." Philadelphia had experienced this for a time,

> "Once housing -stops- appreciating in value in an area, people stop building additional housing in that area." Philadelphia had experienced this for a time, homes not appreciating in value and roughly 10% of the city became vacant land. Once a house got in enough distress that it needed to be demolished, it was cursed, and that curse would domino to neighboring properties. housing appreciation is a good thing. if it appreciates, people will build more housing, people will take care of their properties, etc etc