I found this very interesting article from 2014: http://captaincapitalism.blogspot.rs/2014/11/american-bachelors-financial-legacy.html

I do not know was it already posted here, but here it is, it is worth reading.

Here are some quotes which are most interesting to me:

With more and more men refusing to marry and breed, there is a permanent "Bachelor Class" forming. However, an interesting aspect of this "Bachelor Class" is that they are without a doubt the most "wealth forming" class in the world.

Thus, while everybody is focused on paying off their student loans, getting out from underneath their mortgage, finally closing their alimony, etc. etc., there is this "elite" and "numerous" bachelor class that I (conservatively) estimate will have easily $4 trillion in wealth when they die to pass on.