Dom McGregor, 28, is now five years sober. He stepped back from his role as Social Chain's COO in 2019. Dom McGregor Dom McGregor dropped out of university to cofound Social Chain, an agency now worth $650 million. He increasingly turned to alcohol while navigating the highs and lows of startup life in his 20s. He decided to get sober after getting so drunk at a work event that his cofounder had to intervene. This as-told-to article is based on a conversation with Dominic McGregor, a 28-year-old entrepreneur and cofounder of the social-media agency Social Chain, about his struggles with