New company coming to Decentraland and Virtual Reality.

With the new found hype over NFTs and digital art. A blind eye has been casted over, what really is a non fungible token? A NFT or Non Fungible token has a different standard then a crypto token or crypto currency coin/token. Which is all the same but what makes them different is what makes them work in the the first place. Or how is a crypto currency or token made in the first place.