What can I do in high school to get into HYPSM?

As you all know, top targets are incredibly competitive, and they reject so many people who are obviously geniuses, I'd like to study finance and go into ibanking, and then switch over to hedge funds.

Problem is, I'm a sophomore in high school, no idea what to do to improve my chances. I see all these people with insane resumes get rejected, and that makes me question my chances of getting into a target. I have good grades and do some clubs (state-level debate and mock trial), but I'm worried I'm not demonstrating enough interest in finance. What stuff can I actually do at this age to prove my interest and skill? Invest? Start a reselling business? Both? Neither?

Any advice is appreciated.