Big point to remember: the current high price is artificial. There are only a few exchanges selling BCH, and they aren't accepting deposits. The only sellers are those who had BTC there prior to August 1. So it's a sellers market. There's a ton of demand to sell. Once those deposits are enabled, you'll see a flood of dumping, and the price will crash. So let's say Coinbase allows BCH withdrawals. Unless they enabled…
Because there is greatly reduced liquidity of BCH (most exchanges don't support, hard/slow to deposit into exchanges that do), supply of BCH is artificially limited at the moment. Proponents of BCH can trade their BTC for BCH at a rate greater than they believe it is worth to easily pump the value and 'market cap' (most market cap stats have no measure of this 'locked supply') to make BCH appear more popular than it is at a fraction of the price that would be necessary if selling was easy. This could sway more miners to choose to mine BCH over BTC, and in doing so, actually increase the real value of BCH.
From: https://www.reddit.com/r/btc/comments/6ooorn/small_blockers_...