Helicopter cash, climate crises, smart cities and the space economy — investors have all those possibilities ahead as they enter the third decade of the 21st century.They go into the new decade with a spring in their step, after watching world stocks add over $25 trillion in value in the past 10 years and a bond rally put $13 trillion worth of bond yields below zero. They also saw internet-based firms transform the way humans work, shop and relax. Now investors are positioning for the tech revolution’s next 10 years. Could we see a repeat of the roaring twenties, as the 1920s were known — years of prosperity, ... (full story)