Savings and investments should be used to match your short-, intermediate-, and long-range financial goals.
You save and invest for a purpose, not just to accumulate great wealth.
In fact, you save and invest for many purposes, and how you save and invest depend upon the purpose.
For example, if you need to replace a household appliance costing a few hundred dollars in the next 12–18 months, you will save differently than you would if you were saving to pay for a child's education in 10–15 years. To make these decisions, you need to understand the relationship among investment risk, time horizon, and investment reward.