The soda giant has been a staple for decades. Does it still hold up as an investment?Coca-Cola (KO -0.04%) has been a staple of many portfolios for decades. Warren Buffett loves the stock, and it's understandable, considering how long he has owned it. Shares of the beverage behemoth have gained 4,670% since 1984, and the company has a long track record of increasing its dividend consistently.I can't believe I'm clashing with the mindset of my idol, but I don't see the potential in Coca-Cola that once was, w ...