It may be a very good time to invest in the Australian dollar, as it's coming off a recent low and has rebounded in a way that looks very sustainable.
The last time the Aussie dollar came off a low in the latter part of 2008, it almost doubled in value.
Another reason to invest in the Australian dollar at this time is it's out of favor at this time, which means it hasn't participated in a huge run up as happens once traders take notice of a currency moving up in value. At that time all you're doing is chasing the price. Better to get in before the crowd discovers it.
Added together, the price of the Aussie dollar is inexpensive, starting to sustainably trend upwards, and is still out of favor with traders and investors.
Since the currency is still hated, and the upwards trend solidly in place, it's the perfect time to get into the currency.
As for the Aussie dollar itself, it pays out 3.7 percent interest at this time, the leader among of all the major currencies.
One of the best ways to play the Australian dollar is via the CurrencyShares Australia Dollar Trust (FXA). It pays out a monthly dividend valued at 3.7 percent.