Although there are many options present but people choose mostly Bitcoin for investment and in order to crypto currency career too. We know bitcoin is volatile currency but in comparison to other crypto currency it has stable market value and most of time it is profitable too. Due this many investors choose Bitcoin as their first option for investment. Many people use Bitcoin because of  its decentralised nature and Blockchain technology. In order to start Bitcoin you don't need and working experience certificate nor any age proof. Because of these reasons people like to use bitcoin in comparison to other crypto currency.