Hence why this trader left Australia... Its even more complicated than that Kiwi... CGT is calculated at 50% of the profit, not taxed at 50%...depending on your tax bracket... it's not worth doing that over time, if it pushes you above a particular tax bracket.
I left South Australia, and currently living a comfortable life on the equivalent of the tax I was paying in CGT...(if ya become successful at Trading and you can handle the NZ winter's, it's worth returning to NZ)..