A UBS study reveals that billionaires have seen their wealth more than double over the past decade, with a 121% increase to 13.3 trillion euros. The number of billionaires rose by 50% since 2015, totaling 2,682 as of April 2024, with tech billionaires experiencing the highest growth. Investment trends show a shift towards real estate, precious metals, and cash reserves amid geopolitical concerns, while one in 15 billionaires has relocated since the pandemic, seeking political stability and quality healthcare in destinations like Switzerland and the UAE.