It's a good way to survive harsh times, weather but also a lack of food. A study of 2020 suggests that 500.000 years ago people did hibernate.
Hibernating is also invested by NASA. They want to transfer hibernating astronauts and people to MARS or wherever they like to go. A way to kill the boredom. Hibernating humans is seen like a fantasy and future dream today while it might have normal 500.000 years ago. Humans are mammals so it is possible or should I say a logic thing to do where there's no shelter and a lack of food.