How is 70% of the mining power directed at Bitch Coin? Did Bitmain hijack every Antminer on the planet? No miner in their right mind would voluntarily mine that crap. How did they get that much of the hash rate?
Why would do you assume they will not voluntarily mine BCH? They see this as an opportunity to get much more money for electricity spent. It will be over in a few hours anyway:
Coin Date (UTC 24h) Remaining Change
BCH Nov 12th, 21:09 3 hours, 2 minutes (131 blk) +400.00%
No way miners are that stupid. Unless they can sell their Bitch within the next 12 hours, it will be nearly worthless again. I think the larger problem here is that the Bitmain mining cartel has revealed their hand on how much hash rate they actually control. The community used to get upset when a pool neared 50% of the hash rate. Now we see that someone actually controls nearly 70%.
Why wouldn't they be able to sell their BCH within 12 hours? With blocks coming in at 1 per minute, you can move from pool to market in a few minutes. Furthermore, F2Pool makes it easy for you. They give the miners the option to pay you in BTC instead.
Its a wham, bam, thank you ma'am proposition. Don't worry, most of the miners will be leaving the BiTcH, shortly.