I think that the disease can get worse over time if it goes untreated, i.e. if you decide or are forced to 'ride out' manic episodes by going off your meds or undergo unusual stress that can trigger the disease or amplify your symptoms, successive depressive and manic episodes could be more severe as a result. I read this somewhere once but I'm too lazy to source it properly. Moving house is a major stressor and I hope that you can prepare for the effect it may have on you and achieve a successful transition. Best wishes.