A Wall Street analyst has cautioned Nvidia (NASDAQ: NVDA) investors that the chipmaker’s explosive growth may not be entirely organic.To this end, Goldman Sachs’ James Schneider warned that part of Nvidia’s booming sales could stem from “circular revenue,” a cycle in which Nvidia’s own investments end up fueling demand for its products.Schneider explained that Nvidia’s financial ties with companies like OpenAI create a situation where the tech giant acts as both supplier and investor. When Nvidia backs AI s ...