The non-fungible token (NFT) mania has inspired Ethereum fans to spend more than $224 million on crypto collectibles so far in 2021 through marketplaces OpenSea and Rarible, but many buyers may not understand what they actually own. “An NFT is not that different from any other crypto purchase in that you are buying control over information in an entry in a ledger,” said attorney Nelson Rosario, one of the founders of Smolinski Rosario Law. NFT buyers don’t actually own the media files associated with their blockchain receipts, whether those files…