I put 80% of my money in the S&P after Howard Marks told me not to

In this episode of 'My First Million,' hosts Sean and Sam dive into the surprising role of genetics in financial behavior, citing a Swedish twin study that found 45% of investing habits are genetically influenced. They explore how human nature—rather than financial strategy—drives long-term success, emphasizing the importance of self-awareness and playing to one's innate strengths. The conversation shifts to the idea of 'zone of genius,' illustrated through stories of Monish Pabrai and James Currier, who discovered their true calling through personality assessments. The hosts debate Howard Marks' warning that the S&P 500 is overvalued, with Sean confidently investing 80% of his post-sale capital in the index, arguing that America’s long-term economic trajectory justifies the bet. The episode then pivots to the future of AI, discussing how it’s transforming work—from becoming the 'company brain' to enabling hyper-personalized medicine. The hosts reflect on how the ground is shifting beneath us, with new opportunities emerging in AI, defense tech, and hard tech, urging listeners to stay attuned to paradigm shifts. The episode closes with a meditation on the future of human-AI collaboration and the quiet revolution already underway in health and business. Key takeaways include: 1) Your investing behavior is deeply tied to your personality and genetics—know yourself before you invest. 2) The best investors aren’t the ones reading the most books, but those who avoid overactivity and stick to their zone of genius. 3) The future of work is not AI doing your tasks, but you feeding AI high-quality data so it can make decisions—humanity becomes the input, not the output. 4) The most powerful opportunities are often invisible until the ground shifts, like the rise of AI labs as nonprofits or defense tech startups. 5) Personalized AI health agents are already curing cancer and managing chronic conditions—this isn’t science fiction, it’s happening now.