Americans are living longer these days. That's a positive thing in theory, but from a retirement-planning standpoint, it can be challenging. After all, there's a difference between needing your retirement savings to last 20 years versus 30 years or more.

We are constantly trying to keep up with someone else. But when it comes to saving money, how much should you actually be saving?

Speculators and hedgers are different terms that describe traders and investors. Learn more about the differences here.