DETROIT (AP) — General Motors will move its Detroit headquarters to a new downtown office building next year and work to redevelop its iconic home along the Detroit River, company and city officials confirmed Monday. Is Bitcoin too speculative? CC Share Subtitles Off English Share this Video Facebook Twitter Email Reddit Link view video Is Bitcoin too speculative? The announcement was made at the site of the old Hudson’s department store, which is being developed into a tower and 12-story