I think bitcoin is popular among cryptocurrencies, probably because bitcoin is the first cryptocurrency and has a very significant impact in the cryptocurrency industry.
Price attracts investors it is true and many people are now using to invest in bitcoin because they are agree to make bright future in bitcoin, now many investors are again showing interest for bitcoin because price of bitcoin is very smart that we can easily earn form bitcoin in very short time. It is famous among people because people known are if they are not having any money even then they can earn from bitcoin using signature campaign and bounty campaign.