There was a time that beanie babies, baseball cards and comic books would have yielded similar returns or better. The collectible market can get insanely hot and then die in an instant.
That's what everybody inside the bubble thinks. That's what they must think. It's what makes the bubble work. The bubble must always contain some forgotten ingredient that makes it special. Something that people do not remember about the past bubbles. Then nobody inside the bubble can prove that it will burst and if it's not provable maybe it won't burst.
All three tried to exploit those to inflate the bubble. Given the strategy seems more toys first than limited platinum collector's edition - which doesn't really have much demand over the baseline. I would expect an overleveraged by speculators market to collapse eventually but far slower - akin to the decline in antiques as many new buyers shun them as white elephants.