These two "pick-and-shovel" AI stocks offer attractive growth prospects.There is a massive investment cycle underway in artificial intelligence (AI). Morgan Stanley estimates that spending on AI infrastructure could exceed $3 trillion in the next three years.The companies providing the chips and data centers to enable the AI transformation of the economy could be very rewarding investments for potentially decades to come.Here are two top AI infrastructure stocks to consider buying right now. 1. NvidiaCloud ...