I invest in currencies and commodities and there has been talk for sometime about the collapse of the dollar due to our debt load, entitlements, devisive governemnt etc. Look to the EURO to fall before the dollar does, Europe, as a whole, is in worse shape than we are. If the EURO goes (and there has been delays by some of the eastern bloc of the former USSR to join due to the debt load of the EURO's current members casuing more problems), then there is a strong chance that the dollar will fall shortly after that.
If the RV does happen at a rate that can produce substantial income, I would recommend sitting down with a currency specialist (there are companies that specialize in this) and get their view before making any decisions.