Greg Mankiw, professor of economics at Harvard, has written a paper which seeks to defend the top one percent of income earners (click here). He starts his paper by showing how an entrepreneur (e.g., Steve Jobs) can become super wealthy whilst benefiting society. However, many of the one percent have become wealthy through rent seeking (think financiers and overpaid CEOs) and at other people's expense rather than through creating products or services which benefit society as a whole.
According to Robert Shiller , speaking at Davos, Bitcoin is a perfect example of a bubble - story here . Shiller sees Bitcoin as a backwards step in the evolution of money. George Selgin , a free banker, takes an opposing view - click here . Although he doesn't believe that Bitcoin is money, he sees its development as a fascinating turn in the evolution of money. In particular, he lauds the fact that Bitcoin production is constrained and cannot be infinite. There is a short video below where Bitcoin explain how it works.