NFTs are cryptographic assets which exist on blockchain. These have identification codes and meta data that distinguish them from each other. They offer digital ownership and are easily accessible.
NFTs are thus digital assets, currently mostly art. Conpanies allow musicians to reach out with their music directly to their fans. They can track their royalties on their IPs. Artists interested in charitable things can invite fans to buy into an organisation, and the funds would give them an access to NFTs. It is a great instrument for global artists and for humanity in general.
There is a concept of ‘Living NFT’ where there is morphing as time rolls on, say measuring atmospheric gases like carbon. As the number increases, the art work would depict more fungal growth. If the number goes down, there would be more floral growth. Different charitable ideas can use the same funds by competing with each other.
In fact it is like a democratic process of voting.
NFTs can be paid in cryptocurrencies and by QR Codes which are extensively promoted.