Base Set Charizard (Holographic): Even non-first edition versions can be quite valuable in excellent condition
This plays very nicely with creatures with activated abilities, particularly Adric, Mathematical Genius
Alternatively, if you want to see an example of someone getting screwed by all this Pokmon speculative buying and selling, you can always read about how Logan Paul spent more than $3 million on what he thought were Pokmon cards but instead were worthless G.I
Using TCGPlayer MID pricing data from MTG Dawnglare on December 11th, 2019, I counted nine mythic and seven rare cards valued at over $3.00
The fastest way is the TrackaLacker app for iOS and Android, which sends a push notification the moment a product is detected
If this card is sent to the GY because the monster it was equipped to was destroyed by battle and sent to the GY: You can Special Summon that monster to your field, and if you do, equip this card to it (but banish this card when this card leaves the field)