Elon Musk, the billionaire CEO of Tesla and SpaceX, is known for his unconventional lifestyle and bold decisions. However, one of his most surprising moves was selling almost all of his real estate and choosing to live in a prefabricated $50,

For Musk, the world’s richest man and Tesla’s largest shareholder, those are just paper losses. He owns and runs several other companies — among them SpaceX, Twitter, and artificial intelligence startup xAI — so Tesla’s recent decline is just a flesh wound.

Musk said the U.S. cannot continue with $2 trillion deficits and huge amounts of interest on the national debt.