Humanoid robot Sophia, developed by Hanson Robotics, draws on a piece of paper before auctioning her own non-fungible token (NFT) artwork, in Hong Kong, China March 16, 2021. A digital artwork by humanoid robot Sophia was sold at auction on Thursday for $688,888 in the form of a Non-Fungible Token (NFT), the latest sign of a frenzy in the NFT art world. REUTERS/Tyrone Siu

Humanoid robot Sophia, developed by Hanson Robotics, draws on a plastic plate during a demonstration before auctioning her own non-fungible token (NFT) artwork, in Hong Kong, China March 16, 2021. NFTs, a digital signature saved on blockchain ledgers that allows anyone to verify the ownership and authenticity of items, have become the latest investment craze, with one artwork selling this month for nearly $70 million. REUTERS/Tyrone Siu

Humanoid robot Sophia, developed by Hanson Robotics, holds a brush during a demonstration before her non-fungible token (NFT) artwork is auctioned, in Hong Kong, China March 16, 2021. Titled "Sophia Instantiation," the digital work is a 12-second MP4 file showing the evolution of Bonaceto's portrait into Sophia's digital painting, and is accompanied by a physical artwork, painted by Sophia on a printout of her self-portrait. REUTERS/Tyrone Siu

Humanoid robot Sophia, developed by Hanson Robotics, holds a brush during a demonstration before her non-fungible token (NFT) artwork is auctioned, in Hong Kong, China March 16, 2021. Titled "Sophia Instantiation," the digital work is a 12-second MP4 file showing the evolution of Bonaceto's portrait into Sophia's digital painting, and is accompanied by a physical artwork, painted by Sophia on a printout of her self-portrait. REUTERS/Tyrone Siu

Humanoid robot Sophia, developed by Hanson Robotics, draws on a piece of paper before auctioning her own non-fungible token (NFT) artwork, in Hong Kong, China March 16, 2021. REUTERS/Tyrone Siu

Sophia the humanoid robot, developed by Hanson Robotics, looks at paintings at her studio before auctioning her own non-fungible token (NFT) artwork, in Hong Kong, China March 16, 2021. REUTERS/Tyrone Siu