Fixed price in $ of the Duckies NFTs packs regardless of the value of the $Duckies token

Duckies game packs should have a fixed $ price even if purchased with $Duckies. Example: pack of 50 Nfts worth $20 fixed regardless of the value of the $Duckies token. The problem I find is that if the value of the $Duckies token increases considerably it has a negative impact on the participation of new players and decreases the number due to increased spending. Example with a pack of 50 NFTs. $Duckies token value at $0.010, the cost is 5000 Duckies x 0.010$=$50 $Duckies token value at $0.020, the cost is 5000 Duckies x 0.020$=$100 On the one hand, it favors those who entered the project before, but on the other, it can be detrimental to the entry of new players/holders. My opinion is to find a middle ground.