An ETF that can trade all day is investing in an asset that rarely changes hands. Figuring out what it’s worth is a guessing game.

Musk launched his personal Tesla Roadster into space on February 6, 2018, as a test payload for the Falcon Heavy rocket.

The “asteroid” wasn’t a space rock after all. It was a cherry-red Tesla Roadster that Elon Musk launched into space to much fanfare in 2018 as part of a publicity stunt during the maiden flight of SpaceX’s Falcon Heavy rocket. The car, complete with a mannequin named “Starman” in the driver’s seat, had been orbiting the Sun ever since.