It is true that, nowadays, you can earn money by trading some bitcoin. However, by its nature, bitcoin is not something like that at all. Satoshi Nakamoto, its creator, has invented the system of block-chain as a way to make it possible a peer-to-peer payment system on the Internet without third-party organizations. Thus, for bitcoin to be a pioneer of a brand-new social model or to be something revolutionary, we should SEPARATELY consider bitcoin (and other virtual "currency") and currencies issued by nations.
Well you actually have a point I could actually see that really the point of bitcoin was to the above detailed purpose. However with all things I think that bitcoin is also intended to evolve and to adapt mush more so with it living in the digital world as a digital currency but to me its most selling point was that it led people to have an opportunity to have a much more greater sense and gradp of the flexibilities and the potential they can have. And it shocked the world that it made somewhat a revolution