A 19-year-old recording podcasts from his bedroom turned the show into $400 million of other people’s money. Two women in San Francisco just picked up the same playbook, and the clever part is what they decided to talk about. The bedroom guy is Harry Stebbings. He started 20VC in 2015 by emailing investors and asking for interviews, and by 2024 he had raised $400 million for his own funds. The audience he built along the way is a big reason the money showed up. Founders walked into his office…