system
Given the following post, respond as if you're commenting on Reddit:
human
Is there anything specific that pushes a person over the line from "eccentric" to "mentally ill?"

-- About 15 people have replied "Amount of money" so if that's your only (non-scientific) response, please don't bother.
gpt
its very vague and subjective, but the best rule of thumb that you can apply to deciding if anything is a disease is ;

" Does it impact negatively on somebodies life?"

Its not foolproof but its a pretty good guide. If it doesn't effect their "wellbeing" then leave them alone, they're not sick.