In a blog post published Wednesday, Vitalik Buterin, co-founder of Ethereum (ETH), expressed his wishes to make nonfungible tokens, or NFTs, soulbound as with the namesake item class in popular MMORPG World of Warcraft, or WoW. In outlining his reasons, Buterin explained that if someone shows they own an NFT that is obtainable by doing X, such as attending an auction, it is not possible to tell if the person attended the auction to obtained it or simply bought the NFT via the secondary market.
An example of a soulbound item in WoW | Source: Blizzard Watch