Elon Musk and MrBeast have a complicated friendship — and it may be beginning to turn sour

• The world's richest man and YouTube's biggest star have a long-standing friendship.
• Elon Musk and Jimmy Donaldson, AKA MrBeast, have quipped back and forth on social media for years.
• But their relationship may be souring, as Donaldson does not shy away from criticizing Musk's ventures. 

Elon Musk and YouTube's biggest star, MrBeast, have had a long-standing friendship based on back-and-forth quips on social media.