Platinum is useful in electronics. The problem, it is extremely rare and at around $1500 an ounce, one of the most expensive metals on the planet.
Platinum is used in catalytic converters in cars, and in catalytic converters in power plants.

Platinum is used in catalytic converters in cars, and in catalytic converters in power plants.

Platinum is used in catalytic converters in cars, and in catalytic converters in power