this type of question (and answer) merely sets one up to limit themselves.
i don't care what some traders think is reasonable or not
i trade my setups.
i can be reasonably sure that if i thought X% was the most i could reasonably make that this would affect my trading .
it will, whether you realize it or not
trading highly leveraged futures, i do not even care what people think . i know what i HAVE done. i also know that this is not the theoretical maximum, so i don't begin to limit myself with that sort of mindset.