The power of being yourself and the strength doing what you want. The dream shows that you have an ability to feel yourself and do whatever you like to do in your life. You are the person who is confident enough to be himself instead of pretending someone else. If you are dreaming that you are invincible in front of bad people, it means that you do not care about others opinions and do not let to control your life.
Read more about dreaming of Invincibility in other dream meanings interpretations.