According to Nonfungible.com, NFTtrading volume has reached $17.6 billion untill 2021, a 21,000% increase from that of 82 million in 2020. More than 2.5 million crypto wallets in 2021 belong to those who hold or trade NFTs, while there was only around 89,000 a year ago. The number of buyers rose from 2.3 million to 7.5 million. Although the NFT market is progressing rapidly in 2021, at present, the total trading volume of the NFT market is only 20 billion US dollars. The 24-hour trading volum...