Why did Mike Tyson, who had an annual income of 40 billion yen, go bankrupt? The “Income Addiction” Trap You Can Fall Into, and the Only Law to Become Truly Rich[Economics]

This report discusses the core principles for building true wealth. It begins by pointing out that “making a lot of money” and “staying rich” are entirely different concepts. Using Mike Tyson as an example, it explains the reality that many high-income earners fall into an “income addiction trap”—where their spending expands along with their rising income—preventing them from building assets.
To address this issue, the report proposes redefining the measure of wealth not as mere net worth, but as “net investable assets,” which are practically available for investment. It argues that the secret to building true wealth lies in the simple principle of “increasing income while controlling expenses.” The ultimate goal is set as “financial independence,” a state where living expenses can be covered by investment returns alone. As a concrete target, it recommends building assets equivalent to “20 times annual expenses” and emphasizes the importance of a specific action plan to reach that goal.