Having children as an investment is stupid. You have children because you don't want to be alone. You want someone to talk to when you're old.
That's a poor man's mentality, the ones that failed in using their useful age to seize opportunities or create one and make a fortune so they feel they'll just birth children and leave the responsibilities of generating wealth in future for their kids, thinking about it is kind of insane cause they forget that it the responsibility to parents to give kids proper upbringing and direct them through the path that would lead them to opportunities that would bring good fortune, forgetting that they'll still need to give their kids basic education that would help them acquire wealth in future. It's even better to be child free than have such mentality.