future value of classic performance cars,when to bail out, before the crash?

Correct in what you have stated. In his case the car was never driven after 1975 and only had 1692 miles,stored at his home.Insurance,Registration costs were less that $200 a year if that.Nothing was spent on it after 1975.Anyway the story was about market trends and long term investments. To me there wasn't any fun factor letting it sit.Fun cost money. I do know I don't have much time left waiting for a car's value to increase at my age.
Just to show that collector cars aren't a good investment, I used this as an example and ran the numbers... Let's take that $4000 from 40 years ago and invest it. Let's also figure that it costs $500 or so that it costs to insure, register, and store the car. Add that $500 annually to the investment. With a 7% annual rate of return, you would have over $120K.