Final answer:
Michael would most likely be diagnosed with bipolar disorder, a mental illness marked by significant mood swings, encompassing both depressive and manic episodes.
Step-by-step explanation:
Based on the description of Michael’s emotional behavior, his condition would most likely be diagnosed as bipolar disorder. This mental illness is characterized by extreme mood swings that include the lows of depression (such as feeling depressed, having difficulty completing activities, and experiencing thoughts of death), and the highs of mania (including excessive energy, hyperactivity, grandiose thoughts, and extreme joy).
The signs and symptoms Michael is experiencing, such as inability to complete normal activities, thoughts of self-harm, alternating with periods of excessive energy and hyperactivity, give us a clear indication of the cycles characteristic of bipolar disorder. The intense mood swings between depression and mania suggest that Michael is in the active stages of this disease.