Indeed. Money doesn't circulate without a strong network which is composed by different individuals. Income is generated through services executed to other individuals. That is the basic rule and logic of any negotiations, since the primitive socities.

And in order to boost the efficiency of your services or sales, you should approach people who have a similar taste and mindset compared to you. This way the work will flow nicely, as you and people around you will have a pleasant relationship, and the objectives and expectations of both parts will be matched. Therefore, know yourself, know your product/service and you will know on which public you should focus.