But how “safe” is a savings account if you leave all of your money there for a long time, and the interest it earns doesn’t keep up with inflation? What if you save a dollar when it can buy a loaf of bread. But years later when you withdraw that dollar plus the interest you earned on it, it can only buy half a loaf? This is why many people put some of their money in savings, but look to investing so they can earn more over long periods of time, say three years or longer. Investing When you “invest,” you.