This might not seem like it's all that useful, but there are all sorts of triggered abilities that go off on upkeep, like Suspend cards losing counters, and coming in more quickly
Cao Fang, assistant teaching professor of finance at Northeastern University, who has studied experimental finance, said that unlike the Beanie Baby craze that fizzled at the turn of the millennium, Pokmon cards can be part of an investors portfolio provided they understand the unique risks inherent to owning so-called collectibles
Being able to deal with both creatures and Planeswalkers is kinda relevant, because it was for a long time nearly impossible to deal with Teferi, Hero of Dominaria or even a 5+ loyalty Teferi, Time Raveler
In Magic, Laezel promotes a fun counter theme in the Commander format
In the broader dataset, Japanese inventory and promo cards show up repeatedly among top performers, and they often sell separately from their English equivalents at healthy prices