Shopify stock has struggled in recent years, but it still possesses attractive growth opportunities.E-commerce is a great place to invest for the long term. The global e-commerce market will expand at a compound annual growth rate of 18.9% between now and 2030, when it will be worth approximately $83.3 trillion, according to estimates from Grand View Research.One company likely to be a key part of that growth is Shopify (SHOP -2.39%). Its e-commerce platform makes it easy for merchants to sell products and ...