For example average bitcoin fee is $5-20 whereas bitcoin cash is 2 cents only. So people willl move to altcoins which are more practical (facebook will implement litecoin soon) and bitcoin will burst
No bitcoin will not get in touch to 1000$ again in the future. And you say the confirm transaction it takes hours or a weeks before it reach to the adress destination then you are wrong bitcoin now is more faster only the fee still not good for me but i know soon the devs will fux that in the future.
Bitcoin cash will move backward in the future since bitcoin atom (BCA) will surely goes up as a faster and cheaper and more easy to swap your coins and tokens with the use of atomic swap.