If you're running Fedora Linux without any desktop environment it's probably good to take a look at powertop from time to time. Normally I would have GNOME or KDE manage Bluetooth for me, but as I'm currently experimenting with Sway, started straight from a tty, I have to manage services myself.

Good thing I checked, as the Bluetooth adapter was eating a whole Watt, while essentially doing nothing but sending some useless beacons.

To disable the Bluetooth adapter right from the get go, check the config file in /etc/bluetooth:

grep AutoEnable /etc/bluetooth/main.conf
# AutoEnable defines option to enable all controllers when they are found.