The Nasdaq Composite has surged over 11% so far this month as growth stocks retake center stage. Shopify (NYSE: SHOP), the Vanguard Growth ETF (NYSEMKT: VUG), Nio (NYSE: NIO), Beam Therapeutics (NASDAQ: BEAM), and Roku (NASDAQ: ROKU) have that kind of potential. Here’s what makes each company a great buy now, according to five Motley Fool contributors.