加密货币世界：比特币，区块链和互联网的未来免费在线观看完整版未知　　Five years after his first documentary, award-winning producer/director Torsten Hoffmann revisits Bitcoin and sets out to explore the evolution of the blockchain industry and its new promise. Can this technology, designed to operate independent of trust and within a decentralized network, really provide a robust alternative to the Internet as we know it?