I know 100% that my end-goal is entrepreneurship - to start-up my own company based on a technology I develop, - whether biomedical devices, or biotechnology, or if I'm not feeling too confident about my chances, later switching to venture capital and getting involved in biomedical entrepreneurship as an investor or a CEO.
If either one doesn't look too bright, then just settle for practicing. So that financial independence in the start-up phase - having the MD to fall back upon, as well as while being on the PhD route - not having to worry about getting tenure or the politics, and being able to have independence with what you want to research.
Just not sure how fitting MD/PhD would be for that although I see numerous precedents. Perhaps it could help with research, finding new problems, open some doors in terms of knowing people doing interesting biomedical research/clinical trials?