Although the shares climbed over the last year, the company's best days still could be ahead.DraftKings (DKNG -10.29%) has been a great stock to own over the past year, with the stock up over 55% during that period. However, it's not hard to imagine that the best days are still ahead for the company and its shareholders. The stock has always been a play on states' continued legalization of online sports and casino betting. This has steadily played out, with Vermont and North Carolina the latest to legalize ...