I hope so, but who knows.
I bought mine because I really liked it, you can get them for screaming deals, but also because it is so much more rare than the other models I was considering (boxster, s2000, 350z, etc.).
The SRT6 certainly has some characteristics about it that make it have a good chance of bouncing back and becoming a valuable 'collector' car in the future: Low production numbers, Mercedes-Benz/Chrysler input, most expensive Chrysler to date, first Chrysler w/SRT badge (followed by 300 SRT8), etc.

Let's hope Csaba Csere w/Car and Driver is correct:
CSABA CSERE
Cult-car alert! Twenty years from now, the SRT-6 will be one of those scarce machines that will command a prominent location at concours across the country. Just consider its exotic concept-car-derived styling, its Mercedes-based mechanical bones, and its outstanding acceleration, handling, and braking. Unfortunately, although the SRT-6's performance neatly splits the difference between a 350Z and a Corvette C5, its sticker price is near the Vette's. Furthermore, this performance comes only with an automatic gearbox. Customers attracted to this feature will not likely appreciate the SRT's firm ride. In other words, the SRT-6 is destined to be a rare bird.