The battle of the billionaires is upon us. Recently, Tesla and SpaceX CEO tweeted that he would be "up for a cage fight" against Meta CEO Mark Zuckerberg. Now, Zuck has responded to Musk by posting a screenshot of the tweet and captioning it "send me location."I’m up for a cage match if he is lol— Elon Musk (@elonmusk) June 21, 2023 ZuckerbergTech giants in a 'cage fight'?A Meta spokesperson confirmed the screenshot's veracity to The Verge, saying that it "s...