NFT marketplace OpenSea has seen a steep drop in the daily sales volume, which recently plunged to below USD 1m. The drop comes as the broader NFT market has been spiraling downward and the prices of popular NFT projects have been plummeting. According to DappRadar, plummeting.OpenSea's daily trading volume dropped to around USD 837,000 on June 25, plunging to below USD 1m in more than a year.