Do you have the right to your own opinion?

Do you have the right to your own opinion? I feel that we all have the right to  our own opinion, but to what extent? if you have a job and boss doesn't care what you are saying, so are you just going to say I have the right to my opinion. does that mean he has to care what you have to say. Well now he doesn't because he runs the company and can do what he wants.