The latest update of BCH market is that it trades at $690.38.
How dd you come up with this price? In reality it's much lower, less than a half of it.
https://coinmarketcap.com/currencies/bitcoin-cash/ $270-$280 since yesterday. It's even lower than I expected. I thought it to stabilize around 0.15 BTC, but people keep dumping

It's not going to surpass BTC, don't count on it. Not enough interest and mining power. It will go up though in the long run.