Dropbox for local development, Git for cloud -

i asking question because, while have found related topics, of focus on using dropbox remote, haven't found addresses question:

is there hazardous using dropbox local repo way work seamlessly from/between multiple machines (eg. let's made fork, make changes on desktop, want continue work laptop without running $ git commands), having remote elsewhere?

another way ask question might be: there way use of dropbox-connected machines 1 local development space ... idea of machines on dropbox 1 machine purposes of development... know isn't clear way ask question, don't know how can more clear.

i want make sure there won't conflicts between how repository tracks changes, , way synced via dropbox - more particularly, wondering if make commit, or stage file(s) on machine (let's call these "operations"), , update dropbox-syncs machine b, operations reflected on machine b when dropbox-sync complete, git run automatically ensure operations reflected (and if so, how frequently), or git require me run ensure machine b reflects operations?

dropbox offer versioning @ price , keep edits on period of 30 days, in reality 2 couldn't more different.

git + github provide place push permanently versioned copies of files (e.g. if working on project).

and dropbox provides offsite backup of files autonomously, in event of system crash can recover files or if @ work can share files others without having @ computer.

i'd github great projects want track edits on time.

and dropbox there when want backup of files don't want carry around portable drive everywhere.