There is absolutely no reason to expect gold to become the new global trade settlement standard. The gold standard was abandoned for a number of reasons.
As to the US dollar and hyper inflation, that's an unlikely scenario as well. However, if that should happen, it's not a problem. I assume you have noticed that David has been talking about a "rolling peg". That means BitBay will not be locked at a defined value versus US$ forever. Think about BitBays peg as a stabilizer. It's there to remove the volatility that you normally find in small markets like altcoins, bitcoin, and pennystocks. With the peg in place you can expect BitBay price to move more similar to mature markets like fiat, bonds, and blue chip stock. So, since the price is allowed to move, we can compensate if there are big movements in US$. If the US$ should become totally erratic, we can always peg to any other currency or commodity. A mix of currencies would be my preferred solution. I suspect that's what we will do in the long run, but we have to start somewhere, and pegging to US$ is where we have decided to start.