As troubles for Nvidia (NASDAQ: NVDA) continue, exacerbated by the recent United States Department of Justice subpoena as part of its investigation into alleged antitrust practices, a renowned trading expert has recently said he would not be buying Nvidia stock as he views it as a “debt-driven bubble.”Specifically, expert markets trader Michaël van de Poppe warned that the semiconductor giant was “literally the example of this debt-driven bubble with speculators assuming that NVDA should moon even more, wat ...