You can protect yourself in these ways:
by giving a family member a chance to identify your location in case of need…
to call a taxi when you’re coming out of the pub drunk as bukowski in his books…
you can use your mobile phone flash to send messages in morse code
you can search for emergency solutions on Quora or Google.
you can record audio or video of vandals in your private property so that you can make the report the next day
you can call the emergency numbers
you can write your medical records and health status in dedicated apps.
you can ask siri to send emergency messages
you can use it as a weight inserted into a piece of cloth and twirl it around and turn it into a defensive weapon.