Billionaire Elon Musk took to social media to express his agreement with a fellow tech leader’s prediction that there will be about 1 billion humanoid robots on Earth in two decades.

Musk took to X, formerly Twitter, to concur with the prediction made by David Holz, the founder of artificial intelligence (AI) research lab Midjourney. Holz said in a post last week that "we should be expecting a billion humanoid robots on earth in the 2040s and a hundred billion (mostly alien) robots throughout the solar system in the 2060s."

Musk replied, "Probably something like that, provided the foundations of civilization are stable."

Tesla, one of the companies Musk founded, has developed a prototype humanoid robot that the billionaire may view as contributing to humanity reaching that lofty prediction two decades from now.