Getty ImagesThe world’s largest sovereign wealth fund is currently topping $1.7 trillion.There are some strong contenders for the best financial decisions of all time: franchising a hamburger restaurant in the 1950s; shorting the housing market in 2007; and, despite this week’s slump, buying a bunch of Nvidia stock at its IPO.Near the top of the list, though, is one made by Norway’s government. After declaring sovereignty over the Norwegian Continental Shelf back in 1963, Norway started drilling...