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Elon Musk just achieved another milestone ... because he hit the halfway mark on his way to becoming the world's first trillionaire.

The tech mogul briefly achieved a net worth of $500 billion on Wednesday after Tesla stock climbed by almost 4%, which shot an estimated $9.3 billion right into his pockets, Forbes reports. It's currently dropped to $490.1 billion, according to Forbes' Real-Time Billionaire Tracker . Getty

And just in case you were wondering ... he's on track to become a trillionaire in 2033, when the first of two vesting dates for his proposed $1 trillion pay package from Tesla kicks off.

Elon's new valuation puts him about $150 billion ahead of Larry Ellison , who briefly became the world's richest man this past September, although Musk -- the

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