Hong Kong faces a big change as one-third of its population will be over 65 by the 2040s. Instead of seeing this as a problem, the city wants to turn ageing into a growth chance. It plans to use its family office initiative to invest in longevity funds, silver real estate trusts, and health-outcome bonds. These investments could help create the world’s first “longevity impact exchange.” The health sector also holds great promise. Cities in the Greater Bay Area can build a strong market for wearable devices and home health tech made for Asian seniors. This market is currently led by Japan and Taiwan. Hong Kong could develop wellness centres mixing traditional Chinese medicine with AI diagnostics for personalised health plans. This may attract medical tourists worldwide. Peter Diamandis, founder of the XPRIZE Foundation, runs wellness tours in the US. Similarly, Hong Kong could start East-West longevity tours linking cities in the region. To support this, Hong Kong must rethink city spaces. Seniors could live alongside young people in mixed communities. Shops and childcare centres on ground floors, family housing above, and co-working spaces on top could encourage intergenerational bonds. The government should offer incentives like land premium waivers to developers. Collaboration with global business schools, such as the London Business School’s Longevity Institute, can develop strong economic models and executive training for family offices. Hong Kong’s goal is to lead in the global silver economy by combining Eastern wisdom with Western innovation and financial know-how with social goals. The city aims to transform the “silver tsunami” into a golden opportunity and become a world leader in longevity and ageing solutions.