A unique identifier to develop a universal minimum income? The idea may seem laudable, since it would combat the effects of artificial intelligence, which could upset four out of 10 jobs by 2040, according to the OECD. It is in this context that the idea of Worldcoin, a currency created by the company Tools for Humanity, was born. To qualify, individuals must create a unique identifier, based on an analysis of their iris. However, the service, which has already attracted two million people, is causing growing distrust in Kenya, Europe and the United States.