A few years ago, cryptocurrency was on fire. From the supermarket checkout to family dinners, it seemed as if you couldn't go anywhere without somebody bringing up Bitcoin (BTC). Today it's artificial intelligence (AI) that's got everybody talking. People say AI could do everything from providing customer service to driving cars and detecting serious medical conditions.

Depending on who you listen to, we're either entering a dystopian nightmare or a utopian dream. The rise of AI certainly raises a lot of questions. One of which is connected with identity and what makes us human. Enter Worldcoin, a cryptocurrency created by Sam Altman, the man behind OpenAI and ChatGPT. And shiny bowling-ball sized orbs that scan your eyeballs and prove you're human. And the promise of crypto tokens if you sign up.