It's not every day you get investment advice from someone who says they don't actually invest. But that's exactly what happened when Tesla Inc. (TSLA), SpaceX, and xAI CEO Elon Musk sat down for a podcast interview over the weekend and shared his thoughts on which companies might dominate the future economy.

The punchline? While Musk doesn't buy stocks himself, he thinks Alphabet Inc. (GOOG) (GOOGL) and Nvidia Corp (NVDA) are about to own basically everything that matters.

Why Musk Doesn't Do the Whole Stock Portfolio Thing

Speaking on Zerodha co-founder Nikhil Kamath's People by WTF podcast, Musk explained his unconventional approach to wealth building. "I don't really buy stocks… I don't have a portfolio or anything," he said. "I don't look for things to invest in. I just try to build things. And then there happens to be stock of the company that I built."

So instead of diversifying into a balanced portfolio like your financial advisor might recommend, Musk's strategy is apparently to create trillion-dollar companies and own pieces of those. Different strokes, I guess.

The Future Is AI, Robots, and Rockets

But when pressed on which companies outside his own empire he'd consider valuable, Musk laid out a thesis that's both simple and slightly terrifying in scope. He zeroed in on three sectors: AI, robotics, and space flight.

"There's an argument that companies that do AI and robotics, and maybe space flight, are gonna be overwhelmingly all the value, almost all the value," Musk explained. "So, just the output of goods and services from AI and robotics is so high that it will dwarf everything else."

In other words, Musk thinks these technologies won't just be important—they'll make everything else look like a rounding error in the global economy. No pressure on the rest of the market.

Google and Nvidia Get the Musk Stamp of Approval

When it came to naming names, Musk didn't hesitate. "I think Google is gonna be pretty valuable in the future. They've laid the groundwork for an immense amount of value creation from an AI standpoint," he said.

As for Nvidia? Musk was even more succinct, calling them "obvious." Which is probably the most efficient endorsement you can give a company that's become synonymous with AI infrastructure.

Both Companies Are Already Crushing It

Musk's faith in these companies isn't exactly coming out of nowhere. Both Nvidia and Alphabet recently delivered earnings reports that made analysts' estimates look conservative.

Earlier this month, Nvidia reported third-quarter revenue of $57.0 billion, a 62% increase year-over-year that sailed past Wall Street's consensus estimate of $54.88 billion. The chipmaker also posted earnings per share of $1.30, beating expectations of $1.25.

Even more impressive? This marked Nvidia's 12th consecutive quarter of beating forecasts on both revenue and earnings. The company now sports a market cap of $4.3 trillion, and its shares are up 27.96% year-to-date.

Meanwhile, Alphabet reported October third-quarter revenue of $102.35 billion, crushing analyst expectations of $99.64 billion. Earnings came in at $2.87 per share versus the estimated $2.33. Revenue jumped 16% year-over-year, with double-digit growth across every business segment.

Alphabet's market cap currently sits at $3.8 trillion. Class A shares have surged 69.02% year-to-date, while Class C shares have gained 67.93% during the same period.

So when Musk says these companies are positioned to dominate the future, the present is already providing plenty of evidence he might be onto something. Whether you're building companies or just buying them, it seems AI and robotics are where the action is.