Should you buy, sell, or hold these classic Mopars?

The real top examples of the big ticket Mopars are traded between each other, the top feeders. I bet seldom does a great example sell at auction.
When you read Hagerty article and they mention a 383 68-70 Runner going for $39,000, it was nut and bolt job to perfection and it cost the owner more $ than that to pay to have someone restore it!
Is the LIl Red Express, the 71 340 Demon and the 70 440????Runner primed to make a jump? I doubt anyone really knows. But if so I bet the ones that will appreciate are the top examples bought right and not paid too many $ for. The top feeders drive the market and they are finiky about what they spend $$$$ on.
LIke said in the article basically the Mopar market has never really recovered from the fall of the economy in '07. Then take all the new muscle, old timers like me getting out or dying off, and no wonder the market is flat or falling.
If I had $$ to invest it would not be in the classsic car stuff!