NFT is purchased for its uniqueness in representation and its infinite asset value in the marketplace.
These apps run on a custom built blockchain, an enormously powerful shared global infrastructure that can move value around and represent the ownership of property. This enables developers to create markets, store registries of debts or promises, move funds in accordance with instructions given long in the past (like a will or a futures contract) and many other things that have not been invented yet, all without a middleman or counterpart risk.
NFTs are listed in the marketplace for audience’s interest. NFT’s value is based on audience interest and scarcity.