These kinds of lists always need qualifiers. So at my age, I always take these kinds of lists with more salt than I put in my jar of Kimchee. Even the "Top x most expensive cards" in the hobby would probably need some kind of qualifiers as well.
Shoot, even something like "most sought after" card in the hobby needs qualification. I do not "seek" a T206 Honus Wagner (since I could never afford it), but given the opportunity to "pick" one from a box load of cards, I would definitely "seek" it.
That said, this list is still
way off base, IMO....