What exactly does “non-fungible” mean?
My understanding: The price of an NFT is determined by market transactions. Trading activity is often lower than for fungible tokens, so when you want to sell, there may not be anyone willing to buy.
CryptoKitties, launched at the end of 2017, once caused severe congestion on Ethereum and was one of the best-known early NFT projects.
Transferring and trading NFTs on Ethereum requires $ETH to pay Gas. The current price is 2330.85.