Having a business that have two persons who are investing on that busyness is a good thing especially if we don't have that much money to invest on our business plan and finding a rich person invest on our investment idea will be a game changing and will give us some profit and running our business will be easy, but the thing is most of the times rich peoples would like to have full control on the business that we both invested on and some time they do some bad things in order fully control the business, from my experience in my country there are a lots of problems like this rich peoples will control the business and they remove their co investor.