Robert Zubrin runs the Mars Society and he gets a close-up view of the private space ventures and those who are planning private space ventures.
Zubrin is aware of other groups of people in Russia who would like to pull together a Russian SpaceX. They have technical expertise over there and the sources of capital. Zubrin believes that there are people in China who would want to pull together a Chinese SpaceX.
Zubrin was well acquainted with the previous private efforts in the 1990s as well as Musk's SpaceX. Elon did not just throw some money at the problem and quit as soon as it got tough. He put not only his fortune but his heart, mind and his soul into it. He learned rocketry himself, and he didn't give up when his first three launches failed.