You can use the lore tracker included with the Disney Lorcana starter decks, the games official companion app or simply another way of counting to 20, such as a dice or piece of paper
It is, however, (i) in the best color, (ii) versatile, and (iii) has a third mode that is back-breaking against some popular cards and decks
Heck, theres a Kingdra ex from Shrouded Fable that does 50 damage per Water Energy attached, where its fairly simple to get six Energy on board
From playing with the heroes such as Yuna, Wakka, and Auron, to even finding uses for the minor moments such as the traveling shopkeeper Oaka constantly asking you for money (though in MTG hes after your counters to exchange for drawing more cards)
Grade Japanese cards when: You have a Japanese-exclusive card with strong demand The card is in beautiful condition and the PSA 10 population is still relatively low You're collecting graded Japanese cards for your personal collection The cost of grading is justified by the price difference between raw and graded Grade English cards when: The PSA 10 premium is massive (common for vintage English holos) You have a card that's centered well enough to potentially get a 10 (this is the hard part) You're planning to sell in a market that primarily values English cards CGC and BGS Considerations CGC and BGS grade Japanese cards as well, with some differences: CGC has been gaining popularity for Japanese cards, particularly modern ones
Other cards stay at pretty much the same price, whether they're graded or not