The combination of Pokemon, fine art, a world-famous museum, and extreme perceived scarcity created a speculative mania that drove secondary market prices to absurd heights in the weeks following release
Although there are no Rock-type Pokemon in the TCG, they are replaced with the Fighting Energy, which groups together Rock, Ground & Fighting types
And the card prices shift all the time, like stocks
Playing enchantments that dont do anything the turn they enter always has risks, but its pretty easy to sequence this into a turn where you play something like Birds of Paradise or Paradise Druid to get a card straight away
NOTE: Allocations WILL Occur A classic never goes out of style
This is probably thanks to Pokemon Go being a huge phenomenon that touched many 90s kids who hadnt thought about a Caterpie for over a decade