The modern era of financial planning is no longer confined within national borders. With an increasing number of individuals living international lifestyles—balancing careers, family obligations, and investments across multiple jurisdictions—Smart Finance must evolve beyond mere budget spreadsheets and retirement calculators. It must grasp the psychological, legal, and fiscal intricacies of a global citizen. This is especially true for those considering significant life pivots like expatriation, cross-border taxation, and dual-currency asset allocation. At age thirty-nine, the critical period for strategic accumulation, individuals must analyze more than just returns—they must evaluate purpose, jurisdictional friction, and long-term sovereignty over their wealth. In this financial case study of one such individual, the decision matrix is as complicated as it is revealing. Born in the U.S. but also a U.K. citizen, she has spent years shifting between continents, recently returning...