Amongst the list of good economic decisions to make personally, getting a good partner is one of them although it is often exempted from the list and not mentioned.
I came across something that should have been funny and a joke, but I could not ignore it. Something about a woman bragging about making her husband a millionaire, and anyone hearing it would have been impressed at how virtuous and smart she is, but when asked what the man was before she met him, she said a "multi millionaire". Apparently that is the joke, but a serious look at that will tell you that the person you choose to spend the rest of your life with as a man and a woman will affect your finances.
A good man/woman will increase and help you multiply the resources you have, a bad man/woman will diminish your resources. This is why choosing should be done carefully.
It is good to do business only with your brothers or sisters. And only relatives, because these are people who will not betray, because they are all of the same blood.
You'll be lucky to have family that you can trust completely, because not everyone has that.
There are people who have regretted doing business with their family than even with strangers. Some family members tend to take advantage of the relationship you have with them based on blood and that can be dangerous for business.