I recall years ago reading a magazine article discussing the (at the time) market bubble for either Lionel-style toy trains or baseball cards. So this was probably early 1990s, and it pretty much tracked with when the kids of the late 1940s/early 1950s had reached career endgame and peak earning potential.

They literally had a timeline predicting that eventually video game consoles would have a similar bubble. I want to say I think they predicted it in the 2000s though, so perhaps they were off, but maybe the infographic was just loosely designed.