Should the kids sleep in the separated room?

I have a 4-year-old girl, and I read some articles that it is better to sleep separately with your kid over 3 years old, to build up the kids' independence and courage. But I don't agree with this opinion. we're sleeping in bed from her birth. I often read the book of animals shen she was 2, 3 years old, and took her to the zoo for many times. Sometimes she asks: Mom, it there a big bad wolf in our house? What can we do if the tigers break into?And yesterday night, she woke up suddenly and said: I dream of the scorpion dinasour and insisted to sleep between mom and dad. And I don't know which way is better for her growth. What do you think? via /r/Parenting http://ift.tt/2CUTu5s