Is it a bad sign that everyone is quitting and leaving at once?

One the managers put his notice in last week.
another girl left the office out the blue and went on the sick for mental health.

also when I first started a few months ago everyone would told me that nobody stays long in the company and even the manager says he hopes I would come back after the festive period which made me wonder

Is it a bad sign that everyone is quitting and leaving at once?
Post Opinion