NFT(Non-Fungible token) Protocol based on Metacoin Network

Regular cryptocurrencies or tokens based on ERC-20, are same as $100 in the wallet.Whether you have one 100-dollar or ten 10-dollar bills, these are both $100.Or if you give someone a hundred dollar bill and receive a new $100, the value still don’t change. After all, the dollar is a fungible token. But imagine here is an antique relic which is unknown value. Even though someone makes it the same, it cannot replace the original one. This is the only one in the world and nothing can interchange with the antique relic.