You have no idea how that would destroy the Norwegian State. They are addicted to money from that fund. A collapse in it's value would have direct impact on the finances of the state. Nearly 1/4 of the budget is funded from that found a year.
The contribution of the State Fund to national pensions is around 20-25% to the state expenses
That's got to be a tiny amount relative to the fund size though.
Anyway, how would that destroy the fund? They'd be selling it not giving it away.