To dream of American people represents aspects of yourself that make free choice or are independent. Doing whatever you want or not allowing problems to effect you. Being oblivious to limitations.
Negatively, American people may reflect behavior. Alternatively, it may reflect your feelings about people in your life that are abusing their privileges or advantages.
Example: A young man dreamed of being an American when in real life he wasn’t. In waking life he decided to buy expensive clothing on his credit card even though he was broke. Being American in the dream may have reflected his feelings about never allowing having no money to stop him from enjoying his life.