Unless your brain gets a calming and mellowing effect from caffeine. Many ADHD people have that. Personally, I sleep very well to better with a little bit of caffeine but I can drink a Bang or other high caffeine energy drink and still zonk out without any struggles and sleep comfortably. It doesn't stop my sleep, but can help me be awake if I want to.
(Half life still exists, I'm just talking about the whole "can't sleep with caffeine" thing)