Actually it was the Insurance Companies that killed the muscle car. Well them, and the pollution control devices mandated by the Government. By the time the fuel crisis hit, there were hardly any "real" muscle cars left.
But not all the muscle cars that are bringing big money now, were that popular when they were new.
The Super Birds and Daytona Chargers are just one example. There are plenty more, like my own AMX. Now I'm not saying the AMX is worth anywhere near what a Super Bird is, but it would still cost me between 8 to 10 times as much as I paid for my car when new, to replace it now.
When you consider they built close to 50K Barracudas between 1970 and 1974, and look at what those cars are bringing now, (no matter what engine they have) that should tell you popularity back then doesn't always dictate what a car will be worth in the future. Especially when you look at how many Camaros they built during that same time period, and compare it to what those cars are selling for now. (The Camaro was vastly more popular, and sought after back then, but doesn't bring anything close to what the Cuda's do now)
I'm just saying don't be so quick to write off the Crossfire, and it's potential to some day become a "collectors" item. It has far more good things going for it, than against it.
I predict that at some future date, You will proudly tell someone, "Yeh, I used to have one of those Crossfires when they were new." And I'd be willing to bet whom ever you say it to, will be impressed.