杞人忧天
[qĭ rén yōu tiān]
Originating from an idiom meaning 'worrying unnecessarily like the man from Qi about the sky falling', 'Qi Ren You Tian' (杞人忧天) reflects concerns beyond practicality – overthinking situations excessively until minor problems become monumental fears without basis. This suggests anxious personalities prone to stressing needlessly over improbable disasters.