Fusion releases energy when producing items lighter than iron. It requires energy to create atoms heavier than iron via fusion. It would cost huge amounts of money to produce an ounce of silver or gold that way.
Regardless of energy density, creating gold in a fusion reactor will still be more expensive than digging it out of the ground. We are far from exhausting that natural resource.
Seeing as the only known way the universe makes the stable isotope of gold is through colliding neutron stars, I doubt you can do that with fusion either.