Bitcoin in this year 2017 is more progressive and productive. For me this year is the most bitcoin progressive year because it became popular many advertisement are exist and users are increase. Investors invest to bitcoin even traders use bitcoin for exchange. In addition, bitcoin hit the highest price in this year. Notice that before year 2017 enter the value of bitcoin is 1,000 USD and now before it end the value hit to 7,500 USD. Meaning this year is the most productive year for bitcoin and that's my though about.