Someone listed a card for 3.6 ETH two years ago [0]. In USD: $324 at $90 per ETH. Of course today the price of ETH has risen but the value of the card did not. It's not worth $10k. It's still worth $324 assuming the initial price was correct to begin with. The real price therefore is 0.12 ETH and those 0.12 ETH would be the salary of the creator of the NFT if you were a "freelancer" i.e. your income denominated in ETH goes down over time. Your best bet isn't to keep making NFTs. It's to make them as early as possible, get as many ETH as possible and then just sit on them and never do anything again.

[0] https://opensea.io/assets/0x67cbbb366a51fff9ad869d027e496ba4...