Ask HN: Should I migrate my MongoDB to a more reliable DB before launch?

I have a few months before I launch an app I've been working on for the past year. I started with mongo because in the beginning I did not plan to have that much sensitive data and it was ~80% read. Now that I've come close to my MVP I've included data that needs to be more secure and stable. The majority of my backend is a basic CRUD architecture with heavy reads so migration shouldn't take me more than a week. Will I thank myself later if I switch now to something like sqlite or PostgreSQL? I've read some pretty bad horror stories on here regarding MongoDB as of late and I'd like to save myself a headache.