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小保安王杰被妻子百般侮辱，更被小舅子打成重伤，却在阴差阳错之下，发现了能够穿越回1988年的秘密洞窟。为了给重病的母亲筹集医药费，也为了咸鱼翻身活得像个人样，王杰利用这条唯有自己知道的秘密通道，往来于1988年和现代，当起了倒爷……。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?。