aside that scanning your eyeball for something called Worldcoin sounds like an Illuminati plot from the Deus Ex franchise, why does this need to be a cryptocurrency or how is a worldwide UBI even a business
Step 1: create a blockchain.
Step 2: add some weird twist. Maybe each token represents an acorn of an oak so that we can save the planet by planting more oaks.
Step 3: hold onto most of the tokens yourself but give away a bunch to kickstart the economy of your coin and give it some minimal value.
Step 4: get Coinbase to pick up your coin to increase its value.
Step 5: sell your coins and profit while providing absolutely no value to anyone.