Others in my family have had it but I've only ever met one other person outside of my family who has experienced it. I feel like genetics are a strong predictor of whether you will develop this condition or not. Although I think any person can develop dp if they experience a traumatic enough event. If several people in your family have had it though, I think this can increase the chance of whether you might experience it in your life and if it will become chronic. It is chronic for me even though I don't feel I have experienced a traumatic event and haven't developed it through taking drugs either. Anxiety and depression bring it on.