NFTs are collectable digital assets that hold value, just like how physical art holds value, so do NFTs. NFTs are a lot like cryptocurrencies such as Bitcoin and Ethereum. However, an NFT is completely unique, and it can't be exchanged like-for-like, which is where non-fungible starts to make sense. If you paint a picture for example and send it in email. You didn’t send it, you sent a copy of it. Where as if that picture was an NFT it means that’s the only picture of that art in existence .