SpaceX's $1.75 trillion price tag illustrates the challenge of valuing a company with no obvious public peers. The company's financial backers argue that comparisons to established firms in legacy businesses miss the point of SpaceX's focus on long-term, “secular” economic shifts at a time when few competitors are equipped to handle such challenges. The firm's CFO, Bret Johnsen, has suggested that SpaceX could sell into "the largest total addressable market in human history" - a potential $370 billion in space business, according to two people familiar with the matter. The potential market for the firm’s Starlink internet service is estimated at $1.,6 trillion. However, some investors argue these comparisons are skewed due to aging fixed infrastructure, saturated domestic markets and years of modest growth. They argue that SpaceX's success in manufacturing and expanding into a commercial market driven by demand for rocket launches continues to grow.