"If WFP can describe on this Twitter thread exactly how $6B will solve world hunger, I will sell Tesla stock right now and do it," Musk, the world's richest man, tweeted Sunday.
The Tesla and SpaceX CEO added, though, that the World Food Program (WFP) must publicly unveil how they would use his funds.
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"But it must be open source accounting, so the public sees precisely how the money is spent," Musk added.
Musk's tweets respond to a remark made by David Beasley, the Executive Director of the United Nations WFP, prompting billionaires to help.
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"The governments are tapped out. This is why and this is when the billionaires need to step up now, on a one-time basis," he said Tuesday during an interview on CNN.
"$6 billion to help 42 million people that are literally going to die if we don't reach them. It's not complicated."
"This is just heartbreaking. I am not asking them to do this every day, every week, every year. We have a one-time crisis, a perfect storm, on conflate climate change and COVID. It's a one-time phenomenon," Beasley persisted.
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The WFP Director's interview followed a tweet he penned earlier this month, particularly calling on Musk and Amazon co-founder Jeff Bezos to assist with world hunger issues. Their net worths are $311 billion and $199 billion respectively.
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"Congratulations to @elonmusk for passing up @JeffBezos as the world's richest person - worth a whopping $221B!" Beasley tweeted earlier this month.
"Elon, to celebrate I'm offering you a once in a lifetime opportunity: help us save 42M people from starvation for just $6.6B!! Offer expires SOON...and lives do too."
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Since Beasley's initial tweet, Musk's net worth has increased to more than $300 billion.
The $6 billion Beasley requested would be almost 2 percent of Musk's income and less than the $9.3 billion his wealth increased on Oct. 29.
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Furthermore, last week, the electric-vehicle company Tesla joined a group of companies valued at more than $1 trillion.
Musk is now worth over $100 billion more than the second-richest person on earth, Bezos.
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Musk is now worth more than the annual GDP of nations like Egypt, Portugal, the Czech Republic, Greece, Qatar, and Finland.
He's also worth more than the market value of PayPal, the company he co-founded, as well as streaming giant Netflix.
Musk's worth even surpasses the combined Forbes valuation of the Dallas Cowboys, New York Yankees, New York Knicks, as well as top-level soccer teams Barcelona and Real Madrid ($25.4billion).
Experts recently projected Musk would be the world's first trillionaire but said the fortune would come from his SpaceX venture rather than Tesla.