Why do U.S. authorities want to create Taxes for NFTs holders?

NFTs or non-fungible tokens are used to guarantee the exclusive ownership of a digital asset. It can be a work of art, a tweet or a video game. They are mainly used in the art industry. In recent months, the NFT market has developed well. However, the laws regarding the taxation of NFTs are not yet clearly established. This has led to speculation as to the exact amount of taxation fees that investors will be required to pay.