The heavy machinery company has a bright future, but is it a good value right now?Caterpillar (CAT -1.50%) stock is down almost 14% from its all-time high, presenting a potential entry point for long-term investors. The question remains: Is now the right time to seize this opportunity? Here's what you need to know before considering a position.The long-term case for investing in CaterpillarAlthough it may be seen as an old-economy stock, Caterpillar might surprise many investors due to its exposure to a cou ...