Thousands of studies have been conducted on millionaires — they are examined very carefully, literally “under a magnifying glass”, in order to reveal all the secrets of their financial well-being.And this is what scientists managed to find out.It turns out that millionaires — unlike ordinary people — do not focus on one source of income (such as the salary they receive).They always have many different “cash flows”, the most important of which we will talk to you about in today’s article.Good news!These sources of income are available to each of us.