Bitcoin is the first crypto currency started in the year 2009.It is a new form of economy with  strong network systems and which is linked with the modern technology.The introduction of the modern technology is a major set back for flourishing  the bitcoin world wide because a very few percentage of the people only aware of the modern technology .Bitcoins features are become popular world wide and a vast majority of the people are attracted bitcoin and they started to study and familiarize, hence bitcoin grows through shared knowledge.