I'm about 55 now, and if I was high school or college age again, this is what I'd study. There is huge potential in future biological developments.
Anything but a sports car, really. Driving around in a sports car is just advanced sitting, which I already do to much of, and they are very expensive.
Maybe Warhammer?
For me personally it is most of the time about the balance between what you can afford, what would you think you would like to achieve and what you miss would. Reasonably, most of the people can't "have it all" (family, money, peace of mind, results, etc.).
The larger breakthroughs will be driven by AI and new instruments. Biological understanding has always been about developing the right tool/instrument to answer a question.