The Vanguard Mega Cap Growth ETF is a great way to invest in top AI stocks.Technology and artificial intelligence (AI) stocks have been leading the market higher for the past couple of years, but more recently, the market has been pulling back, led by many of the same leaders that drove it higher. This pullback could be a good opportunity to start loading up on the Vanguard Mega Cap Growth ETF (MGK +0.60%), which is heavily weighted toward AI stocks.What's great about this exchange-traded fund (ETF) is that ...