A billionaire venture capitalist who has known Elon Musk for decades says there’s one crucial thing that Americans should understand about how the adviser to President Donald Trump operates. Musk doesn’t value the opinions of other people,

The brother of Tesla CEO Elon Musk has been selling Tesla stock. Kimbal Musk has been offloading shares in recent months, just as Tesla stock has made a massive retreat from all-time highs that put the stock, however briefly, among the select group of trillion-dollar companies.

The latest billionaire to signal his interest in the space travel industry is former Google CEO Eric Schmidt. The wealthy tech magnate has joined a relatively under-the-radar rocket startup, Relativity Space, as the company’s new head executive.