Fim works best for the types of files that don't change frequently, or shouldn't change at all. I use it for photos, digital art files, videos, music, books, records/receipts, etc. When I started, I put everything into fim, but there was too much noise to be useful.

Files that change frequently (password database) or won't totally bork out if there's a bit flip (text notes and org files) don't really need their integrity managed manually.