Firstly, if I may request, if you don't like the thread just don't post. I don't come here to see pictures of dead horses and graemlin-only filled posts. Thanks.
I agree with VM here regarding looking at history as a basis to "predict" the future. I personally think that SA Marvel are the best bet to at least hold value or increase.
Will the vast majority of 1980s and later books be worth as much in 40 years as SA books are now? Doubtful I think.
Will most CGC 9.4-9.6's be worth more than what is being paid for now, 5 or 10 years later. Doubtful also I think.
I'm young at 24 but a huge SA fan and have no plans of quitting the hobby for a long time.