Over the past few years, what sounds like an episode of Black Mirror has been unfolding in real life: millions of people around the world have agreed to let metallic orbs scan their eyes in exchange for receiving a blockchain-based ID and a cryptocurrency called Worldcoin.Beginning this week, Worldcoin (WLD) will be available in most of the US for the first time, including via exchanges like Coinbase. Those who scan their eyes at a World orb will receive 16 WLD. Meanwhile, people who have downlo...