This isn't a dividend that investors should feel comfortable relying on right now.Walgreens Boots Alliance (WBA 0.26%) is a stock that is in deep trouble. It isn't trading just at 52-week lows, it's trading at levels it hasn't seen in more than 20-plus years. The company's new CEO, Tim Wentworth, faces an uphill battle trying to turn things around for the struggling business, as well as convincing investors it's worth buying shares of the pharmacy retailer.Walgreens cut its dividend this year, but I believe ...