Bitcoin is a type of digital currency

HISTOYR:
*BITCOIN was introduced in 2009

               * at that time the coin rate is 2$

               * after that it can grow continue 

               *  now it can grow above 1500$

IMPORTANT #:

              IN this digital currency they can not identify who sent money and from where
              Most of the people using this bitcoin 
              Billioner are also using this bitcoin to transfer money