Money can’t buy happiness, but it can buy Elon Musk a social media platform and the ability to publicly beef with someone half his age. The projected trillionaire took a swipe at singer Billie Eilish’s intelligence Monday after the singer used her following to call out the insane amount of money being hoarded by the richest man in the world.

“She’s not the sharpest tool in the shed,” Musk wrote, attacking Eilish’s decision to reshare a handful of infographics citing various ways Musk could do some good with some of the billions of dollars he already has.

"Musk could choose to spend $40 billion every year to end world hunger by 2030 or provide universal safe clean water for $140 billion for the planet for the next seven years," one slide, shared from nonprofit My Voice, My Choice, read.

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