In fact, Peters has already confidently predicted an economic crisis post-election, and begun distancing himself from it[3].
My current bet is on the coalition collapsing, with new elections held in October 2018. A few of my NZ friends and family are placing similar bets; closest guess wins.
I'm glad I left for Australia in 2007.
[1] http://thewireless.co.nz/articles/winston-why-are-you-like-t...
[2] http://www.theaustralian.com.au/news/world/jacinda-ardern-ca...
[3] https://www.stuff.co.nz/business/industries/98061685/Winston...