Great question and very relevant. Can't wait to hear G.A.tor's response. Can we tack on to this question what would happen to any key book, e.g. AF15, Hulk 1, Action 1, ...
for the immediate future, blue chips would appear to be "relatively" safe.... though, personally I've seen some of them appreciate to aggressively of late for my tastes...
Won't these blue chips eventually hit a high that they will have no where to go but down? Especially when older collectors or their heirs start selling off these comics. I'm not sure kids growing up now will have the same connection or desire to purchase these books in 30 years, as present collectors who grew up with them. I know we don't have a crystal ball, but can you see AF15 continuing to rise at its current rate and not eventually come back down to earth, market correction. Will the demand be there to pay the skyrocketing prices?
they are already 50-75 years old and still skyrocketing...virtually no one buying today had any direct connection to initial release...no reason to think next generation will behave any differently...
in theory all items have a ceiling price...but, mor often than not, the ceiling becomes the floor after it is reached