Bitcoin is not legal tender, but it is legal to use bitcoin. We need regulations in many countries to protect bitcoin users.
For that to happen you need people with influence, power and the right connections in politics.Something which isn't easy for Bitcoiners.
In Argentina for instance this might be possible soon.
https://news.bitcoin.com/argentinas-new-president-might-just-bitcoin-supporter/The good news is that the new president has already revealed his support for Bitcoin-related activities. Indeed, while he was mayor of Buenos Aires, his administration organized the First Bitcoin Forum, in July 2015.
It is reassuring to know that the new Argentine president already has a relationship with Bitcoin. In effect, the First Bitcoin Forum in Argentina was organized by the government of the city of Buenos Aires, in July 2015, when Mr. Macri was the mayor of Buenos Aires. The Bitcoin Forum’s venue was the auditorium of the Buenos Aires city hall. Mr. Macri’s then-Minister of Modernization of the Government of Buenos Aires, Andrés Ibarra, gave the Bitcoin Forum’s opening speech.
Let's hope for the best!