If they wanted to overcome bipolar, they would have to review and face their trauma, the misinformation that the trauma entailed, and learn new coping mechanisms that mama and dad never taught them.
I find that bipolar personality types had high-functioning role models (parents?) in their lives, but were offered little coaching by these very busy, otherwise preoccupied parents. So, the expectation to perform is high and the skills are low. That leads to deep depression and feelings of inadequacy, that are so excruciating they have led to trauma and ultimately dissociation. The dissociation produces exhilarating self-assuring messages of superiority, expansiveness, or grandiosity, born of a genetic theory that people are inherently who they are. So, now they see that they are inherently divine. All of us are born Divine, in my opinion. Childhood experiences disavow us or confirm these beliefs, which can lead to a lack of humility.
So, this injured soul believes she has inborn superior powers, which she now acts out. Since they are born of vivid fantasy, they are not grounded. These fantasies are a set-up for failure. Hence, the grown child falls into a depression until the boost resurfaces.
Healing from bipolar will require the extended coaching mama and daddy never offered that leads to earning our way constructively and the experiences that enhance problem-solving.
The key: aim for prevention of hyper-emotional episodes rather than either a total cure (unlikely) or just managing the symptoms. Learn factors that keep the episodes at bay, factors like for instance getting plenty of rest and solving problems rather than letting them fester. Learn also to recognize the earliest signs that an episode is beginning; responding early on makes treatment most effective.