Worldcoin, the crypto startup from OpenAI founder Sam Altman, is launching a layer-2 Ethereum blockchain.The blockchain will be based on Optimism's OP stack blockchain-building framework to offer users cheaper fees and faster speeds.The chain is designed to prioritize verified humans over AI bots and trading algorithms. Users who authenticate themselves via Worldcoin's retina-scanning "orb" device will get special treatment.OpenAI founder Sam Altman's retina-scanning crypto startup, Worldcoin, i...