I don't think OKCOIN would be the holder of this sort of amount. Reason why is because China is only trading about 5% of the total Ethereum trade volumes per day. Not sure 12% of all ETH would be cooped up in one exchange in China when ETH was rumoured for the longest time to have Poloniex as biggest ETH holder of all ( for 1 wallet that is ) - Way too much ETH was moved without any sort of notice. Exchanges I don't think would be dumb enough to be moving that sort of ETH hours before a hardfork...How would they explain that to their customers? See what I mean?
I don't think OKCOIN would be the holder of this sort of amount. Reason why is because China is only trading about 5% of the total Ethereum trade volumes per day. Not sure 12% of all ETH would be cooped up in one exchange in China when ETH was rumoured for the longest time to have Poloniex as biggest ETH holder of all ( for 1 wallet that is ) - Way too much ETH was moved without any sort of notice. Exchanges I don't think would be dumb enough to be moving that sort of ETH hours before a hardfork...How would they explain that to their customers? See what I mean?