Ask HN: What are the other ‘Musk’ian problems?

Colonising Mars for humanity to survive a possible mass extinction event on Earth, igniting an electric car revolution to accelerate the transition towards clean energy, creating a high throughput brain machine interface are the kind of solutions that would have a positive impact on humanity.

It seems very likely that there are more problems of these kind out there. If we don’t limit our thought process and start using the ‘First Principle’ approach, what are the other ‘Musk’ian problems that we can collectively come up with?