Shopify stock makes up the largest position in Cathie Wood's portfolio.Cathie Wood has made a name for herself as a disruptive tech investor. She's not afraid to make risky moves, which makes it exciting to follow her portfolio. She hasn't always been right, but her investing thesis often needs time to play out.Shopify (SHOP 0.05%) is one of her favorite stocks. She has positions in three of Ark Invest's exchange-traded funds (ETF): 3.75% of the flagship Ark Innovation ETF, 2.87% of the Ark Next Generation ...