Fashion sneakers, Beanie Babies, and MtG cards all have had prices inflated above the price for comparable goods (regular sneakers, teddy bears, and regular playing cards), you can say that. Fashion sneakers and MtG cards have had longer runs in popularity than Beanie Babies had and sneakers have more intrinsic value to people than either MtG cards or Beanie Babies do, but they're all different.
You can say that they are all fads, but owning shares of a company, learning a particular programming language, or picking a university to apply to are all subject to waves of popularity that can obscure their value for people as well.
The question seems disingenuous.