Bitcoin.

Bitcoin seems to be the flavour of the moment, with any number of analysts' speculations, media articles, explanations, sales pitches and advertising going around.
Given the language being used and the widespread pulling in of previously risk averse friends and neighbours, it just sounds like a hugely ramped up pyramid scheme to me, and I will be steering a wide birth. 
However, I will be attempting to gain some understanding of the so called "block chain" technology behind it which appears to have every opportunity to be a game changer in global finance.