I don't follow the logic. Bitcoin has no fundamentals, so it can go as high or low as it wants.
GameStop has fundamentals. But you're free to ignore them; they're not hurting anything. GameStop has everything Bitcoin has, plus some extra things; it is therefore worth even more than Bitcoin is.
Said another way, it is nonsensical to claim that Bitcoin has no fundamentals. If you believe that (1) Bitcoin has "no fundamentals"; and (2) GameStop has fundamentals tethering it to a market capitalization of a few million dollars, what you're actually saying is that Bitcoin has fundamentals tethering it to a market capitalization of zero dollars.