Before revision: SpaceX CEO Elon Musk explains the future capabilities of his company’s “Starship” to senior leaders of the North American Aerospace Defense Command, U.S. Northern Command, and Air Force Space Command, April, 2019 A billionaire is a person with a net worth of at least one billion (1,000,000,000, i.e., a thousand million) units of a given currency, usually of a major currency such as the United States dollar, euro, or pound sterling.
After revision: SpaceX CEO Elon Musk explains the future capabilities of his company’s “Starship” to senior leaders of the North American Aerospace Defense Command, U.S. Northern Command, and Air Force Space Command, April, 2019 A billionaire is a person with a net worth of at least one billion units of a given currency, usually of a major currency such as the United States dollar, euro, or pound sterling.