Nvidia doesn't need to build a quantum computer to make a lot of money in the quantum computing market.Back in California's gold rush in the mid-1800s, thousands of individuals flocked to the region hoping to find gold and strike it rich. However, the easy money was instead made by the suppliers who sold tools to the gold prospectors.Today, the term "pick-and-shovel investing" honors that legacy. Oftentimes, providers of ancillary products and services achieve greater success than pure-play companies do.Cou ...