When it comes to your personal copies, Im a strong advocate of getting what you want right away
If youre holding a card with no visible rarity stamp at all, check the bottom corner under a bright light: AR and SAR cards sometimes have the code printed very small against the textured artwork
The simplest answer is graveyard hate, with cards like Leyline of the Void, Rest in Peace, and Relic of Progenitus being among the best in the format at fighting Dredge and Surgical Extraction also offering a decent amount of value if you can get the timing right (exiling Narcomoeba or Bloodghast makes it hard for Prized Amalgam to return to the battlefield, while getting rid of Creeping Chill with the "exile" trigger on the stack will fizzle the damage)
Each series has cultivated a loyal following of fans and gained extreme popularity throughout the media industry, inspiring trends and maintaining a significant presence in the gaming industry across decades
1998 Japanese Illustrator Pikachu PSA 10 Recently Sold For $5,275,000 Many serious collectors are well aware of the worth of this particular Pikachu card, featuring an adorable piece of artwork created by Pikachu's original illustrator, Atsuko Nishida