Will never happen because BCH is only a child of BTC and BTC market is more trusting than BCH market. I think BCH needs more time to be able to declare BCH be able to defeat BTC.
This prediction did not come true, and I also have doubts that bitcoin cash can come close to bitcoin. Now I read about new hard fork
and some new chain splitting, as I understand soon we will have new bitcoin child as you call them, but in a fact that is just one new
alt-coin. As this topic, soon we will see new ones about new alt-coin and questions can it cost like bitcoin.
Bitcoin will be the first and most trusted coin ever, and new coins made from bitcoin will have success probably but not like bitcoin.
September is soon over and bitcoin cash is far from bitcoin in price and popularity, it will always stay far behind.