 Hello, I'm Katya Adler. Today on The Global Story, we're looking at the mystery of the missing crypto queen. Ruja Ignatova swindled billions of dollars from investors, and then, with international police forces hot on her trail, she vanished. Is she off living the high life with her ill-gotten fortune, or was she murdered by her gangland associates, as some now claim? That's on The Global Story from the BBC World Service, right after the news.