Yesterday at the gathering, someone mentioned that a certain top Chinese miner boasted at the dinner table about having 400,000 bitcoins, but it could be a case of misinformation; 40,000 should be about right.

Everyone roughly calculated that Chinese miners as a whole should have no problem exceeding 1-2 million bitcoins, but they keep selling while the U.S. keeps buying. U.S. institutions probably have around 3-4 million bitcoins. The exchange owners should also have about 1-2 million bitcoins.