10 years ago, Musk already ranked AI, genetics, and brain-computer interfaces as the top three for humanity's future! In 2016, Sam Altman asked Musk: If you were 22 years old now, what would you choose to study? Musk's first answer was AI. He believed that in the short term, the technology most likely to have the biggest impact on humanity is artificial intelligence. And the greatest risk is that humans might not be able to ensure it leads to a good outcome. The second was genetics. He directly mentioned that if genetic reprogramming could solve hereditary diseases or even prevent dementia and Alzheimer’s, it would be incredibly important. The third was brain-computer interfaces. Musk thinks humans already have a "digital third self" made up of phones, computers, emails, and apps. The problem is the bandwidth between the brain and this digital world is too low—typing with fingers and interacting with screens has become the bottleneck. Fast forward about 10 years, and those three directions that once sounded like sci-fi are now the cutting edge of the tech industry.