Is it normal i sleep in a big box?

I work the night shift, and mostly sleep during the day. Used to, I just threw blankets over the window and that was it, but I decided to splurge on a big moving box and sleep inside of it instead. I inserted one of those futon mattresses inside of it, along with some pillows and blankets. The box helps to further keep out the light during the day, and makes me feel safe and secure.