I'm an only child in my family. It's quite lonely without any siblings.
I have two siblings. Are there any benefits to bring an only child?
Not really. Being an only child is actually relatively uncommon, historically. It's very boring.
It must be nice to have all your parents financial support at least. Not split between the others. 
True, but we don't get to have that sibling relationship. I think my parents did it because it's expensive to have kids.
Yeah it is a shame there are not systems around to support parents trying to afford to have a family.
to the country.
From 1979 to 2015, the one-child policy in the People's Republic of China restricted most parents to having only one child, although it was subject to local relaxations and individual circumstances (for instance when twins were conceived).
Families may have an only child for a variety of reasons, including: personal preference, family planning, financial and emotional or physical health issues, desire to travel, stress in the family, educational advantages, late marriage, stability, focus, time constraints
an active fantasy life that includes imaginary friends. Children whose only siblings are much older than them sometimes report feeling like an only child. Advantages cited of having an only child are the decreased financial burden, the absence of any sibling rivalry, and that it becomes possible to take the child to an event suitable for their age without having to bring along a disinterested sibling. A disadvantage is that it can be harder for an only child to singlehandedly look after their aging parents.
Stereotypes.
In Western countries, only