Most chinese miners have cheap electricity. I'm guessing if they are still mining most of them are still largely in profit, so a few percent difference is not gonna change things. Price had been going sideways for a while and nobody was actively buying so putting up ask walls wouldn't have helped and selling in small chunks would have taken forever (I'm guessing they probably already sell in small chunks on a daily/weekly basis).
There are so many mined coins in circulation and not much fiat on exchanges, considering that unbalance, eventually stuff like that happens. Supply/demand. Then price hits a technical break, breaks a few important trend lines that traders take that as a sell signal so prices slowly continue downwards.
If you want credibility as a bear on here, then suggesting that Chinese miners can't be bothered to actually sell their coins gradually to get the best market price probably isn't a great start.
Once you agree that selling like we just witnessed is simply there to paint the chart and push the price through a trend line then we can have an honest conversation. The same thing happens when the price moves upwards. The reality is that the number of coins mined is pretty insignificant compared to total daily trading volume - not even discussing the fact that not all miners sell. These games will go on until it is clear the price cannot be pushed lower through buying support. Watch out above then.
You don't know how much in trading volume is coins traded back and forth, that's not what you should look at. Since we are talking about miners dumping, what you should look at is fiat on exchanges that can absorb these dumps, and these amounts are very low and decreasing compared to the
insane amount of coins mined, far from being insignificant.
https://bitcointalksearch.org/topic/an-analysis-bid-ask-sums-on-btc-exchanges-conclusion-no-demand-for-btc-934650https://bitcointalksearch.org/topic/m.10537338Simply put -> insane amount of coins mined (supply) + very little (and decreasing) fiat to absorb them (demand) = unbalance, hence downtrend.
But again, coins mined is just factor among many, as a general rule saying that "bears don't have coins to sell anymore" simply doesn't make sense because that's not how markets work.