It's rather splendid to think of all those great men and women who appear to have presented symptoms that allow us to describe them as bipolar. Whether it's Hemingway Van Gogh... Robert Schumann has been mentioned... Virginia Woolf Sylvia Plath... some of them with rather grim ends.
I believe it's extremely important to include some other type of fitness activity in your training so cross training will help you to avoid injury when you are dancing.