What’s your greatest fear

It’s probably taken me years to realise that I fear dying alone. My friends and I always imagine really bad situations and we state the what if’s. “What if a shooter was to come” “what if the apocalypse were to happen” so many others. They always reply with run away. But my answer is always the same because I’ve come to the realisation that I fear dying alone. I always say

“I would stay together with as many people possible”

This is really random but what’s your fear of fears?