I don't know.. I'm a flutist myself. x___X But it's easier to be a professional musician playing the violin then the piano, because there are many more violins in an orchestra then a piano. (usually there's ONE piano player, and, mm, depending on the orchestra, 20+ violins? )
It depends...do u want to? Playing an instrument takes a lot of time and commitment, because you have to practice. My friend plays the violin. She says it is hard, but likes it. Again, it depends what you want to do. From personal experience- don't play an instrument for someone else or if u dont want to...it is torture!