John Kelleher

John Kelleher is a freelance web developer based in Cambridge, Ma. He has a BS in Applied and Engineering Physics and a prior career in the defense industry. In his free time he enjoys exploring the world of digital currency. He tweets as jpkcambridge

  1. Virtual Currency


    Bitcoin is a digital or virtual currency that uses peer-to-peer technology to facilitate instant payments.
  2. Virtual Currency

    Bitcoin Mining

    Bitcoin mining is the process by which transactions are verified and added to the public ledger, known as the block chain.
  3. Virtual Currency

    Why do Bitcoins have value?

    Performing with transactional anonymity, Bitcoin has value as a private digital currency, investment tool and social networking ...
  4. Virtual Currency

    Medici, The Blockchain Stock Exchange

    Overstock CEO Patrick Byrne's revolutionary Project Medici would list Overstock securities on a blockchain-based exchange--a ...
  5. Virtual Currency

    What Is Bitcoin's Intrinsic Value?

    What would bitcoin's price look like in the event of widespread adoption?
  6. Virtual Currency

    Why The Winklevoss Twins' New Bitcoin ETF Matters

    The Winklevoss Bitcoin Trust, currently moving towards regulatory approval and expected out later this year, will be a Bitcoin ...
  7. Virtual Currency

    Bitcoin Mass Hysteria: The Disaster that Brought Down Mt. Gox

    The disastrous halt in trading on Mt. Gox, a popular Bitcoin-trading web site, sent the Bitcoin world into a panic.