No redistribution, and certainly some rich people have taken advantage of it to gain even more money.
But it is (at this time) also a good opportunity for some people who don't have much money to increase their revenue investing or earning money by working for the different projects which are developed in this economy.
In fact, that remains to be seen. Personally, I wouldn't say there is no redistribution, though I definitely agree about the rich grabbing even more riches. My point is that while the poor remain as poor as they have always been and there's no redistribution because there's basically nothing to redistribute among them, this is not quite true in respect to the wealthier parts of society. In essence, every technological breakthrough or advancement brings about new elites. But new elites can't get to the top without overthrowing the old ones. In this manner, some redistribution of wealth should necessarily happen, and the new money takes over the old money.
Basically redistribution of wealth doesn't depend on any currency, in fact it depends on the form of the economic system. Bitcoin no doubt is a new financial system and currency but still it is a part of the capitalist economic system. It is not the currency to be blamed but the flaws are in the system, like everyone knows that in capitalism the rich becomes richer and the poor becomes poorer. Bitcoin being a new technological invention brought up some early adopters to the rich society, but it is now itself caged by the rich to make them richer. This will go on until any new and better economic system is introduced to the world.