in the middle of the night for a protein shake or another meal?

Personally I set my alarm 4 hours from the time I lay down for bed and when that goes off, I down a shake while half asleep. Its already pre-made and sitting in my mini-fridge which is right beside my bed. I guess Im just wondering if anyone else does this because after 2 years of doing this every night, its getting a little tired. My theory has always been that getting in 50-60 grams of carb-free protein is golden right in the middle of a sleep for muscle growth. And I always felt it great for cutting as well because it helped keep your metabolism sky high. If I quit doing that then I just picture my muscles starving for protein during the night and the growing process taking a step backwards. Just want to hear some thoughts on this. Also, this middle of the night shake is my 6th and last meal of the day and if I did stop taking it, I would just squeeze my meals during the day a little tighter to fit the shake in somewhere. Thats not a problem at all. I guess its more a psychological thing.