Nakamoto is the surname of the pseudonym under which the Bitcoin white paper appeared in 2008, and it has become shorthand for the project's origins and principles. BTC is the common ticker used on exchanges and in price feeds. Together the two parts form a name that speaks directly to people already inside the Bitcoin world. The .com ending gives it an international commercial address that suits a brand with global ambitions.
As a brand name it carries heritage without describing a specific service, which leaves the buyer room to define the product. It could front an independent publication on Bitcoin history and development, a hardware project for nodes or signing devices, a clothing line, or a meetup series. Its tone is respectful and rooted in Bitcoin's founding document, which suits projects that value the original design.