Jimmy Donaldson, widely recognized as MrBeast, has achieved billionaire status at 26, primarily through his YouTube content. Starting with simple videos, he gained fame for challenges, giveaways, and philanthropy. His business ventures, including Beast Burger and Feastables, alongside strategic content reinvestment, propelled him to become YouTube's most-subscribed creator and a leading philanthropist.
source https://timesofindia.indiatimes.com/technology/social/mrbeast-net-worth-hits-1-billion-youtuber-becomes-worlds-youngest-self-made-billionaire-at-age-27/articleshow/121345967.cms