The legality of bitcoin depends on who you are, and what youre doing with it.
There are three main categories of bitcoin stakeholder. Someone may fall under more than one of these categories, and each category has its own legal considerations.
I consider Bitcoin legal and do not cause big problems if I use Bitcoin in terms of work and my investment assets. But the Government in my country has not yet authorized Bitcoin but it is still allowed to use Bitcoin although not free. As long as I do with Bitcoin are positive things that bring good impact, I will continue to use and maintain Bitcoin in my life.