The Paris School of Economics is hosting a really nice website on top incomes across 22 economies. The top incomes data stretches from the early twentieth century to the present day. For example, the share of total annual income going to the top 1% of earners in the UK has risen from 6% in the 1970s to close to 14% today. In other words, the income share of top earners in the UK is back to pre-WWII levels. A similar pattern exists for Ireland. You can access the database here.
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.