The Gitcoin Presents non-fungible token (NFT) collection is soaring in value after its open edition mint concluded Wednesday, taking the top spot across leading marketplaces. The collection is rapidly rising in interest and value because of the association of Ethereum co-founder Vitalik Buterin with the project, though his direct involvement in the NFT drop has not been established.

Over the span of one week, collectors minted 9,221 tokens at a floor price of 0.5 ETH, or about $770. The collection has already hit the secondary market in full force. According to data from OpenSea, the collection’s trading volume of 7,763 ETH, or nearly $12 million at the time of writing.

The mint, executed by blockchain funding company Gitcoin and NFT platform Metalabel, aims to commemorate a 2018 paper about Quadratic Funding, a public fundraising mechanism authored by Ethereum Foundation founder Vitalik Buterin, Harvard economist Zoë Hitzig, and social activism organization RadicalxChange founder Glen Weyl.