I think the price will increase highly because there are no free electricity for them and mining bitcoin will be more expensive. Chinese groups must decrease mining machines so that they can not sell bitcoins with cheap price and bitcoin will hit over 1,000$ again.
what the price have to do with them not mining anymore, i highly doubt a single little farm can put any dent in the market volatility
also chinese don't need to sell their bitcoin, they have roied on their equipment and new one will roi very fast because they have monstrous hashrate
they only need to pay their expenditures which is ridiculous low in comparion to what they are making