Is it advisable to have two kids or one child is also fine, considering that the kid will have no real sibling?

Having 2 kids or not is totally ones personal opinion. Different people will have different perspectives. I wanted 2 kids always and hence I have 2 kids! Many believe siblings grow apart as they grow up. But again no one can predict the future. Its how we bring up our children matters, Of course, personally I believe having a sibling is necessary.