Has the world become poorer?
The short answer is No. 

Every single year, except 2009, for the past 55 years of continuously recorded economic history, the world has been getting richer. The -2.1% global recession in 2009 was made up in 2010 with 4.1% growth. I was just working with the World Bank's World Development Indicators, which track global GDP growth, and I double checked.

We measure prosperity and growth by the quantities of goods produced. Money is irrelevant. Every year we, humans, produce more and more goods and services and that makes us richer. Not every country grows steadily though. Some countries are stagnant, like Greece, and some grow remarkably rapidly over very long periods of time, like China. Moreover, there is increasing inequality withing many countries (measured by GINI coefficient). So it is very natural for many to feel like everything around them either stands still or degrades. But on average, the world keeps getting richer.

If you are in Switzerland, you may have felt the shock from recent currency appreciation. Sharp currency appreciations hammer exporters and industries reliant on tourism, which make up a large portion of Swiss economy.