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ERC 721 Security token

The Purpose NFT are security tokens, they are considered by many to be the key to cryptocurrencies achieving mainstream adoption, due to their focus on tokenizing digital and non-digital assets, which makes them useful for almost any industry or application. PGN token is an ERC 721 security token This security tokens and the digitalized assets they represent the ownership of a PGN NFT. The main purpose is, that each PGN is transparent coded on the blockchain, represents a unique artwork from a unique source, and cannot be replaced nor changed. What is an ERC-721 security token? ERC-721 is a token standard on Ethereum for non-fungible tokens (NFTs). Non-Fungible means not interchangeable and not replaceable; Bitcoin is fungible because any Bitcoin can replace any other Bitcoin. Each NFT, on the other hand, is completely unique, one NFT cannot replace another.