[bufferoverflow]

The economy is not limited to Earth.

[dredmorbius]

Practically, it is.

Impractically, that buys you surprisingly little.

"Galactic-Scale Energy"

In 2450 years, we use as much as all hundred-billion stars in the Milky Way galaxy.

https://dothemath.ucsd.edu/2011/07/galactic-scale-energy/