There are of course numerous factors you look at when you decide a place to invest, a place to live, or a place to holiday. For these activities NZ has a great deal of appeal because its low-income per capita has decimated the currency. It has often lagged between 0.5-0.75 USD for the last few decades. This collapse occurred after the 1960s commodities boom. In days gone, countries like Australia and NZ were among the richest countries in the world.
I can see a time in about 10-15 years when the NZ currency will be stronger. It is possible that NZ will capture some of that long-lost glory. That is a long time off. I am expecting NZ to have an energy boom. i.e. Methane hydrates mined from the sea floor, lignite pellets, and perhaps even conventional gas. With offshore oceanix areas the size of the EU, and a stagnant population of just 4.2 million, there is economic potential in those 1000-metre deep southern seas. It will take time to find, delineate and develop these resources, however one good discovery will compel a great many other explorers because China and India need energy. That is a lot of wealth for such a small country. Expect it to have its own 'Norwegian-style' economic miracle.