Black Market of Bulletphilia: 100th Black Market

The story is after the Rainbow Dragon Cave (Th18). 'The market god said. 'Ability cards will spread, they will become obsolete, and the market will return to routine.' But somehow, contrary to God's wishes, the cards are only increasing in value. Is someone manipulating the value? Or is it because some collectors are buying them up? Just when the card market was in turmoil. A market where God cannot intervene - the black market has opened.