Most Pokmon card enthusiasts fall into one of three categories: collectors who love the franchise, gamers who play the trading card game, and investors who want to make money
Each of these decks are simple to play, and fun to master
So yes, holo foil or any other special treatment will usually only be seen on the front of cards
The Scarlet & Violet series introduced us to hyper rare gold cards being the most difficult to pull from any set, so seeing a Pokmon as iconic as Pikachu featured as one, there was no denying this wouldn't be a valuable card
Value in Shiny Treasure ex is heavily concentrated at the top, and three cards do most of the heavy lifting: Mew ex #347, the clear number one Charizard ex #349 Gardevoir ex #348 After those three, prices drop off quicklyand that pattern itself is worth understanding before you buy
The first blue card that does not inspire many is Urzas Rebuff