NFTs can be anything digital, and are commonly being used as a way to buy and sell digital art.
The CFPB names more specific risks that consumers should be prepared for, including volatile exchange rates, potential high fees on exchange platforms, and fraud risk. If your funds are lost or stolen, they can be especially difficult to recover, thanks to the decentralized nature of blockchain and lack of any governmental oversight.

Whitepaper. A startup or established company publishes a whitepaper to tell potential investors about its ICO, or Initial Coin Offering — the technical details, objectives of the product, information about the team behind the company, and other details.
Every cryptocurrency transaction is recorded in a public ledger known as the blockchain, which is the technology that makes it possible for it to exist. This allows people to follow the history of cryptocurrencies like Bitcoin to prevent them from spending coins they don't own, copying transactions, or undoing them. Because blockchain intends to eliminate intermediaries such as banks and internet marketplaces, there are no transaction costs.