There is no capital gains or wealth tax at all in New Zealand, but only for domestic investments. For offshore investments there is a deemed return that you treat as income, so if your wealth is tied up in illiquid stock then it can be dire.
The same applies to house ownership too for example. I did pay 0 income tax over 150k profit I made over my previous house when I sold it. When the money was on my account the wealth tax started to kick in, but it is after you make the capital gains not at the moment you make it.
I just learned about this fact this year or so and it's absolutely bananas how people are just accepting this as a normal thing. In what world does it make sense to pay taxes to a country based on citizenship rather than actual location/residency?