They might drop in value a lot when driverless technology goes mainstream. If the supply of sedans is the same but the demand is way less because driverless car

They might drop in value a lot when driverless technology goes mainstream. If the supply of sedans is the same but the demand is way less because driverless cars don't need to be wasted sitting parked 90%+ of their existence, that could make used cars way cheaper for a while.