MINYANVILLE ORIGINAL Thanksgiving and Black Friday are fast approaching and consumer-based companies are bound to see an uplift in business in the coming days. In particular the increase of grocery and consumer product sales are bound to favor the bottom line of Costco (NASDAQ:COST) which remains the leader in wholesale retail despite resisting the changes Amazon (NASDAQ:AMZN) has made to the industry. Still the question must be asked: Is Costco a stock worthy of investment or are its glory days soon coming to an end?   To really answer this question we must first dive into Costco’s strengths and weaknesses. ...