If you think the vision of "digital gold" will win then maybe you should hold 2 BTC per BCH.
Here's why you're wrong:
Yes I believe Bitcoin is digital gold. That's why I buy and hold it. Rarely spend it. Holding is what gives it value, as well as a store of value.
Even if I thought that BCash was good for spending (which I don't), I don't have to hold it. I can just buy and spend it whenever I want, on the fly, as needed. But why even do that when fiat will do the same thing.
Gresham's Law at work, dude.
Edit: Either way, does not the law say that you mention that bad money expels good money? I do not understand your logic.