Bitcoin is legal in Japan. But even if it wasn't, Bitcoin doesn't need the government's blessing to become a legitimate whatever-you-want-it-to-be tool. Who is the government to decide for me what's legitimate or not? I can figure that out for myself, don't need anyone doing that for me. It's always governments this and governments that; can you guys actually think on your own or do you always need governmental input?

Letting a bunch of criminals (yes, governments are criminals) decide for you what's good or bad isn't the right way to move forward. Bitcoin gives you financial freedom, which is an extremely powerful tool. Governments controlling people's wealth means they control the people, it's that simple. Bitcoin breaks through that. It will take time for people to realize that, but eventually more people will become aware of how rotten the system is, and that they have been supporting it with tax payments for decades.