Storage, resale timing, and audience all play roles
Especially when it has been created by Mizutani Megumi, the designer behind the popular cards such as Professor Sadas Vitality and Mortys Conviction
For example, a hyper-rare gold card, the highest rarity in the recent Scarlet and Violet era sets, is [often] worth less than a Special Illustration Rare, the rarity below hyper-rares. She explains that some Illustration Rares (IRs) are worth more than Special Illustration Rares (SIRs), and Mega Hyper Rares (also gold cards) are now some of the most expensive cards in the modern era and are even rarer than hyper-rares were. [22] Sports card and memorabilia collector Chris Frey says that each Pokmon set will have 3 or 4 special edition cards with different art and illustrations that people chase after
The beauty of the TCGO is that it caters to all experience levels every step of the way, so even if you skip the tutorials, the single player has a help system that reminds you of your current play options and suggests optimal moves (of course, you can also turn all of help functions off if you don't need them)
"Battle Tests", where trainers battle each other to see who has stronger Pokmon