This is the prime example of an asset backed by big-money interests. If it drops, it is always when we least expect it. When an increasing number of people here post ideas that suggest BTCUSD may fall, it most likely will not.
In the coming days, there is indeed the risk of miners revolting. But they'll probably handle it the same way they did last time: selling their BCH for BTC .
When the big-money investors will no longer have BCH, they'll be exposed. It is very hard to say when this will happen, but perhaps somewhere in 2018.