by Kenadi Silcox While there are plenty of high-flying stocks in 2020, so far the S&P 500’s top-performer isn’t some gadget maker or drug company rushing to save the world. It’s a marketplace for dainty crafts and elegant artwork. Etsy, the Brooklyn, N.Y.-based e-commerce platform for small-time sellers of vintage and hand-made goods, is having its best year since going public in 2015 thanks in large part to the coronavirus pandemic.