Hey, remember MoPar Mania? They went up like a rocket and dropped like a rock (not a rocket on a parachute) but now they are back up again. It's a cycle. If you love your car and intend on driving it until you die and leaving it to your estate to figure it out, who cares. If you think it is an investment and want to maximize ROI, then watch the market and cash out when you think it is near the top. Then wait to the bottom and buy again. (I did that on my house in Las Vegas.)
Recall that noone thought anything of Michelangelo, Picasso and Andy Warhol when they were alive ...
In 1970 you could have bought an original 289 Cobra for about 3000 and a 427 for 4000. A GT40 was maybe 5000. They were really just leftover race cars that noone wanted. When Shelby was bringing the 6 Daytona Coupes back on the ship from Europe he almost dumped 'em in the ocean rather than pay import duty (since all but 1 was actually built in Italy).
It's all being at the right place at the right time.
I'm having fun, so like was said, the boost is icing on the cake. I expected to lose money as I have on every other car I've ever owned. Anything else is "icing on the cake".