IF your decision is based on the weakness of the US dollar and your thought that it will get weaker
pick a different currency.
First, it's hard to get a good exchange rate on a currency that is so rarely traded.
Second, China goes out of it's way to peg the Yuan to the Dollar and this desire will only get stronger as the dollar weakens since it aids their exports (the lifeblood of their economy) and they need to find jobs for tens of millions of their citizens.
Take a look at the chart on the Dollar/Yuan over the last few months.
http://finance.yahoo.com/m5?a=1&s=USD&t=CNYEven while the dollar has gyrated wildly, the exchange between Dollar and Yuan has been essentially flat. Yes, I know the chart looks bumpy, but look at the scale - it has fluctuated between a low of 8.2766 and a high of 8.2772. A variation of around
seven HUNDREDTHS of a percent. While the dollar has gone hundreds of times as far in single days.You're going to pay an exchange fee of AT LEAST 5%
(both ways) to buy and sell the currency unless we are talking about significant dollar amounts.
There is just no way to make money here unless you believe China is about to make some drastic move. And if you really were in a position to make that assumption? You would already know how to invest in the Yuan.