Gold and Ni have different utilization.

Gold mostly is the way to save your money under inflation (i.e. real estate)

Ni is driven by economy demand. The price is effected not only by inflation but mostly by the production (steel manufactures) demand. This is the main cecle of economy. If global economy is growing the demand will grow.

So technically Gold and Ni are in the contadiction and at the same time moved together in case of inflation concerns.