The price fluctuations are too damn high to get paid a full salary in btc especially when the number of places where you can buy something with it isn't huge (it's constantly growing though). We need a massive amount of time to fully adapt cryptocurrencies and i personally think that such thing will never happen. Cryptocurrencies may be a revolutionary step to the future world without fiat currencies, but i think that cryptos are just a first step. New Zealand government has shown their acceptance and support to cryptoworld, but it's just another step. Anyway - good for them.