The expanding number of HNWIs, especially VHNW and UHNW, means a larger addressable donor market for global health and development nonprofits. Key regions (US, Asia) will have more millionaire next-door types as well as mega-donors. Importantly, wealth concentration means that a relatively small number of individuals control outsized capital – targeting even a handful of new UHNW donors can dramatically boost a nonprofit's funding. Keeping an eye on wealth reports (e.g. Capgemini, Knight Frank, Wealth-X) can inform prospecting strategy – for instance, identifying fastest-growing wealth hubs (cities like New York, London, Singapore, Mumbai, etc.) and emerging philanthropist profiles. A data-driven approach might focus on "centi-millionaires" (>$100M) as prime prospects, given there are only ~28,000 worldwide and many are seeking ways to create a legacy.