I was an only child and when my father went bankrupt and committed suicide leaving me to deal with creditors, his distressed widow who had no assets, etc, I obviously wished for a sibling at the very least to discuss the threats we were getting. Years later, having seen the effect that my nutty brother in law has on his family, it occurs to me that if I actually had a sibling and they turned out to be nutty like aforementioned in law, it would actually have made things worse and increased the burden. Just saying ... yeah it would be nice to have a sibling, but only if they were reasonably normal.