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  Because bitcoin is an invisible currency with no central bank or government to regulate it, bitcoin users put their faith in a complex system of decentralized oversight called mining. Anyone can join to workforce of miners, who use mathematical equations to verify individual transactions — ensuring, in effect, that no one tries to spend …

  For many people, the idea of cryptocurrency, or digital money, is downright mysterious. Still, cryptocurrency has been around for more than a decade, and a growing number of people are starting to use and invest in the world of virtual coins and tokens. But what, exactly, is it? How does it work? And how …