Is it safe to sleep in my motorcycle helmet?

just am starting to get into biking now, I've noticed that my helmet is extremely comfy and I've been up for a while, I am currently on the floor with my helmet in replacement for a pillow. Is it safe to sleep with my helmet on? have any of you guys tried it? via /r/motorcycles https://www.reddit.com/r/motorcycles/comments/95sd1r/is_it_safe_to_sleep_in_my_motorcycle_helmet/?utm_source=ifttt