Could Costco Be a Millionaire-Maker Stock?

There's no doubt that Costco (COST 1.11%) has been a fantastic stock to own historically. A $170,000 investment 10 years ago would be worth $1 million today, translating to a tremendous return of 488% (as of Jan. 15). This crushes the gain of the broader S&P 500 index.Can this top retail stock be a millionaire maker going forward? Here's what investors need to know about Costco's investment potential as we look ahead.Customers are the focus What makes this enterprise truly special is how much the business f ...