Musk, who also runs SpaceX and a number of other companies, has been known to make big often exaggerated promises. For example, he once called the Hyperloop, which was never built, the "fifth mode of transport" and famously promised to take Tesla private in a Twitter post, saying he had secured financing that he didn't have.

Tesla CEO Elon Musk expects the production of Optimus robots will potentially grow fivefold every year to eventually reach 100 million annual units. He predicts Optimus could generate $10 trillion in revenue.

Trump's tariffs on Canada and Mexico could drastically affect two of Musk's most prominent companies, SpaceX and Tesla.