(METRO) — The world’s first trillionaire won’t come from cryptocurrency or some clever new app – he or she will become rich from asteroid mining.

That’s what bankers Goldman Sachs reckon, anyway – and several companies are now vying to be the first into space.

NASA estimates that the total value of asteroids out there could be up to $700 quintillion – equivalent to £75 billion each for us here on Earth.

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