Why does it matter if bitcoin cash over takes bitcoin, if everyone who owns bitcoin got free bitcoin cash coins? If bitcouin cash will be valued more, you will still have the money.
Why does it matter? Because we care, we don't want these alternative coin to best out bitcoin because bitcoin is the original and not BCH. We don't want those people behind the currency besides they are attracting miners which is their goal the reason the demand is going up now, not only that, those big shots are backing it so obviously it will be pumping up.