Organic, but how? If not greed, why did buyers bought the coins just for the sake of hiding their black money behind the scenes?
If not greed, why the sellers are not taking old notes anymore? It's all greed for which everyone committed wrong deeds, but I would say it's not greed, but business and Indians did it just because of demonetization, but the effect seems to be melting now.
Organic because of the ratio of demand and supply. As far as I know all the transactions at various trading platforms are done via the banking system (as an investment option) which leaves no room for black money conversion. There is no point in stereo typing.
Definitely there is no chance of converting black money using bitcoins. If it were possible, people would have rushed to do so. However, some people might view bitcoins as a secure means to store money (black or white) in the future. That could have led to the increased demand.