The price of Worldcoin (WLD) has hit a $20 billion market valuation barely 24 hours after launch, with the Sam Altman-founded coin hitting an all-time high of $3.30 soon after its listing on exchanges. However, WLD is now down by 35% since hitting yesterday's peak, with the altcoin also down by 20% in the last 24 hours, as the hype surrounding its launch settles down and early buyers take their profits. And while Worldcoin's aim to provide a universal digital identity is certainly ambitious, its use of biometrics (e.g. iris-scanning) has left some commentators disturbed by its potential threat to privacy.