How vulnerable are you?

I remember when FB was trending, people were posting vigorously on every moment of their lives. Things like I am in the airport, in Berlin, at a bank with selfies etc. Years later, some realised that this might not be so safe. Others still continue to post like that. How much of your personal information do you give out on social sites?

I don't care where they are or what they ate or how they traveled. I can see some of my colleagues and juniors posting every activity with a selfie to support. I think they want the world to know that they have achieved something in their life.