If we're to believe this article in the Financial Post, comics are a fantastic investment opportunity whose major drawback is the threat of the "middle-aged, pot-bellied delegates dressed in spandex superhero outfits" the monocle-wearing gentry might encounter while prospecting for paper gold at conventions.
Seriously. It's not that only a select number of comics can demand hefty prices, and probably fewer collectors can afford to actually pay those big bucks. Or even that the bottom could fall out of whatever market there is.
No, it's that investors might have to rub up against overweight fans in too-tight clothing.
Oh, the sacrifices one must make for that first million dollars ...