✔ 最佳答案
The record high of the exchange rate of AUD was around AUD1=HK$7.3, but it only stayed there very briefly. Despite waves of favourable news over the past three months, it failed to break through and stay above HKD7, and since the election it has pretty much fluctuated within a narrow range between HKD6.75 and HKD6.85. Some say AUD has been over-rated, and as i) US will not cut its interest rate too much further because of inflation, ii) the subprime effects on the global economy are yet to be seen, and iii) the Labor Party tends to spend than save as shown in its track record, it seems that the Australian dollar dosn't have too much strength to challenge its own record. If the US economy recovers sooner than expected, it may even drop back to its previous level. So, for saving, yes, because of its higher interest rate than HKD; for speculation, don't count on it in the short term.
NZD has stayed between NZD1=HKD5.8 and HKD6.0 most of the time for the past two months. Right now it's apparently at quite a high level. So you be the judge.