Meet the digital phenomenon that's worth in the trillions of dollars, that uses more power than the nation of Sweden, but that very few people - including those involved - even understand. Cryptocurrencies are notoriously complicated, the best way to understand how they work is to understand where they came from. In this programme: the history, the technology, the economics, and the psychology. Plus, latest news from the crypto-world: NFTs and multi-million art sales, 'stablecoins' and financial misconduct, and finally - will the whole thing come crashing down? Like this podcast? Please help us by supporting the Naked Scientists