What a great idea. For me it would be Astronomy. I have always been curious about the universe around us. There is so much to discover and explore that I think we have just touched the tip of the iceberg in this area. I'd love to know more about the comets that have passed us by or even made contact with earth. The vastness of the universe always leads to that question of life beyond earth. To learn more about the makeup of different planets and to fully understand the impact of the changes we are experiencing here on earth. I have heard of these services that will provide people with the opportunity to go into space for a short ride. As much is this is going to be mind blowingly expensive I think it would be amazing! Maybe my crypto will get me there. haha