Furthermore, the allocation of your Pokmon card investments should be diversified, just like any other type of investment that you would consider
Rarity matters too
The black and blue core paper fake cards have way better quality of the print and pass the bend test and some seem to pass the light test as well (even most cards don't pass enough light, those that do the light is of different color - it's not that blue, but if you don't have enough experience with this you might not see the difference)
With some healing cards, like Potion [Scarlet and Violet], you might just be able to score a massive OHKO
Thats completely besides the point, though
Deny someone their Sunforgers search and cast while still unattaching the equipment, stop that Senseis Divining Top from going to the top of their library, or allow an opponent to sink 50 health into their Aetherflux Reservoir only for you to counter the ability and stop them from dealing 50 damage to you