The cumulative sales of NFTs on the Bitcoin chain exceeded US$4 billion. 0x News reported that as of June 4, CryptoSlam data showed that the total sales of NFTs on the Bitcoin chain exceeded US$4 billion. In the past 30 days, Bitcoin on-chain NFT sales reached $171 million, ranking first among all on-chain NFT sales. It was followed by Ethereum with $159 million in transaction volume and Solana with $90 million in transaction volume. (Cointelegraph) https://cointelegraph.com/news/bitcoin-nfts-4-billion-all-time-sales-volume