Jared Isaacman and his wife Monica at the Science Museum in London on 3 May

Haydon Perrior

The space industry should aim to fly thousands of people in orbit at once, according to billionaire Jared Isaacman, who recently spent three days circling Earth on his own Inspiration4 trip aboard a SpaceX Crew Dragon capsule.

“The number one key performance indicator that we should all be following is the number of people in orbit at one time,” says Isaacman. “When we flew on Inspiration4, it set a new record with 14 people in orbit …