<p><img src="https://images.cointelegraph.com/images/840_aHR0cHM6Ly9zMy5jb2ludGVsZWdyYXBoLmNvbS91cGxvYWRzLzIwMjItMDgvNDNjNThiNDctN2U2OC00NDZhLThiNDktMjkyMTFjNzAzYzhlLmpwZw==.jpg"></p><p> Trading volume from NFT marketplace OpenSea has gone from $405 million on May 1 to $5 million in Aug. 28.</p>