The price of any asset is controlled by supply and demand, and Konami has perfect control over supply of any card and a strong influence over demand
While blue may think the pen is mightier than the sword, reds rebuttal is that a huge dragon trumps all
The goal was to earn cards by going above and beyond expectations (i.e., doing something nice for someone, meeting behavioral goals) and trading cards with peers until a full set was made
It could be possible that the card was originally intended to be that sets centerpiece but subsequently shelved until Bandit Ring [XY7], the next set
At different levels of rarity, however, they may not be particularly prevalent Id highly recommend checking out our guide to One Piece Card Game Rarities, so you can take a look at what your chances may be for finding cards at Rare, Secret Rare and Leader rarities and more besides