Mr. Nakamoto retired from public view in April 2011, leaving the development of Bitcoin's code and the construction of its network to members of a thriving community. And "Nakamoto" who is, to this day is still unsolved mystery. The Bitcoin system, however, does not depend on Satoshi or anyone else for its functioning -- it relies on mathematical principles of complete transparency. The invention itself was groundbreaking, and it has spread to the fields of distributed computing, economics, and econometrics. 

 You always know how to make me laugh even in the worst times.  Yeah! @honglonh