the system. for example, i run sdpd, hcsecd etc. on my laptop always.
when i need, i simply plug my usb bluetooth dongle it - presto - it
all works. magic! :) if you bind to a particular radio, then you tied
to it. cant do anything before radio is present and cant do anything
after radio is gone.
You are [presumably] using devd to [notice that you inserted the dongle
and] configure it anyway, there is no reason it can't start any other
services you might require..