I experience that kind of dissociation too (depersonalisation and derealisation) but don't find it safe because it gets very hard for me to function effectively because I get brain fog along with it.

I think it WAS safe /adaptive when I was younger but now it impairs my everyday life. I've bad anxiety top and that kind of dissociation serves as a circuit breaker from sky high anxiety but doesn't help me function effectively etc or respond adequately to dangerm