Should You Buy or Sell Nvidia Stock?

After the chipmaker's massive run-up over the past two years, what's the right move for investors now?Nvidia (NVDA -0.01%) has been one of the best-performing stocks on the market over the past two years, and the catalysts that drove it higher are still present. But after its strong run-up, is Nvidia stock still a smart buy at its current level, or would those who hold shares be advised to sell and take some profits?There are valid arguments for both views.The sell argument: How long will this demand wave l ...