Ripple seems much to my bewilderment to be pegged to around a 2 cent price level or 2 billion dollar market cap. If the US dollar collapses that peg won't do them any good if the dollar were to crash in value 90%. In order to manipulate the price to adjust for the inflation the coins would have to be bought up by a central authority and either destroyed or sat on with the good faith of the users that the coin won't be misused or abused. If the price got high the central authority would release new coins into the system. In this way the price achieves stability. The question is.. who decides what the correct price should be? Also the mechanism for removing and adding the coins would have to be determined.

Better to just leave it up to the market to decide.