system
Given the following post, respond as if you're commenting on Reddit:
human
[Batman] What sort of precautions does Bruce Wayne have against someone trying to kill him while he's asleep?

I've read various things like how he only needs 3hrs sleep, something about micronaps or whatever. But even then, what if someone who knows Batman is Bruce Wayne plans to murder him in his sleep, carefully planning out when to strike. Who is to wake up Bruce if someone was standing over him with a knife or gun?
gpt
Well, firstly if he's sleeping in Wayne Manor there's all sorts of anti-intrusion measures and alarms built into that place to hopefully detect someone long before they could reach his bed. It is possible to get around them if you're exceptionally skilled (pretty sure Cassandra Cain's done it, and a couple of others from the batclan. Ra's Al Ghul has. Deathstroke and others of his level could).

But if they do get through his security without being detected, Bruce is as much meditating as he is sleeping, so he's not so deeply unconscious that he couldn't hear or otherwise detect someone coming up on him. The intruder would have to be very skilled and lucky to hit him without waking him. Honestly, they'd probably have a better chance if they just sent a missile at the house (although Bruce probably has some sort of emergency defense for that built into his bed too).