The largest non-fungible token (NFT) marketplace has hit another impressive milestone in 2021 amidst growth in that market. What Happened OpenSea has surpassed the $10 billion sales volume milestone, just three months after passing the $1 billion mark. The milestone was broken down by Mason Nystrom of Messari Crypto on Twitter. OpenSea had sales volume of $24 million in 2020, $8 million in 2019 and $473,000 in 2018. OpenSea has a significant lead ahead of rivals: Rarible and SuperRare have sales volumes of $264.0 million and $178.0 million, respectively, according to DeCrypt. Play-to-earn NFT game Axie Infinity ranks second for sales volume with its own platform hitting $3 billion in volume in the game’s lifetime. OpenSea has 635,698 traders on its platform, compared to 83,810 for Rarible and more than one million for Axie Infinity. OpenSea completed a $100 million funding round in July valuing the company at $1.5 billion. …