Do Kwon, the failed cryptocurrency boss who engineered the $40 billion (£32.7 billion) collapse of the terraUSD and Luna tokens, is allegedly hiding in Serbia, according to South Korean officials. Prosecutors for Seoul's Southern District said they will work in tandem with Serbia to get him into custody. After the tokens collapse in May, Kwon, 31, was charged with fraud and violations of capital markets legislation. Interpol issued a global arrest order for him in September.