No matter how rich you claim to be and how supportive you try to be, investing on your circle is the best way to go about sustainable living. This topic is more relevant in today's world of economic uncertainties, where you can be rich but still needs external supports or sources to thrive in the business arena. Having friends who can always stand in as a support system and assets is better than accommodating liabilities.
Although, for truth to be said, you need to have the financial or intellectual capacity to be able to invest in friends first, then, you also need reasonable friends who are interested and ready to tap into the opportunities available to them.