Finally, no way this strategy is too late. Do you really think the US economy is going to improve anytime soon??
I am far from being a currency expert. However, in the near term a flailing US economy has already been built into the current exchange rate. US interest rates are not bound to go much lower. Europe has their own problems and I could easily see the dollar gaining on the euro over the next year. If you are looking for true stability then perhaps Swiss francs are the way to go.