I just saw on Arkham that brother Winklevoss transferred $130 million worth of BTC to a hot wallet of one of the major exchanges this week. It seems like they really want to sell, since they rarely move assets in such large amounts. It's interesting, considering they still hold another $764 million worth of BTC. Their total profit from Bitcoin has already reached $1.8 billion, so this is just a small part of their portfolio. I don't know what their motivation is—could be to take profits, or maybe for other needs. But such a large transfer will definitely attract market attention, especially coming from the provocative Winklevoss twins.