Floppy-diskettes are beastly slow, and very unreliable.
If you want to, make a bootable CD-ROM. But... let's be honest... your distro probably already has a media that can be booted into a "rescue mode," and if not, there are plenty of things like knoppix that do.
What you should spend some time doing, instead, is trying out those bootable disks, when your system is working just fine, so that you better understand how those environments will work ... before you need one. That will be time very well-spent.
You probably should plan on having a "wired" connection for your keyboard and mouse, because even though Bluetooth may be convenient once the system is up-and-running, it might be a bit too much to expect those drivers to be available at boot-time... especially dual-boot. Certainly the boot-loader won't be prepared to talk to Bluetooth. And I just don't think that the "futz time" required to make such a thing work, if you could do it, would ever be worth the investment. It's a "cut your losses and plan on doing something else" thing. Keyboards are cheap. So are wired mice.