The truly desirable cars will hold their value but I think over time the less desirable ones will plummet. What we're seeing is between all the flippers out there and the high cost of living in today's world the number of under-40 car guys is a shrinking demographic. As the older generations age-out, their collectibles will fetch good prices by those who can afford them but I think the ho-hum stuff will be overlooked much the same as as happened with the 20-50's hotrod scene. The older stuff is getting almost undriveable to someone accustomed to the creature comforts of a modern vehicle. If electric vehicles become more mainstream due to fuel pricing or regulation we may over time see that become a bit of a cultural shift against our old clunkers.