At the top of the list is convenience. With a well stocked cellar, you can be assured of having the right wine at the right time. It is also fun to analyze a wine as it matures, to make note of the subtle changes in its taste and structure. By having the wine in your cellar, you can drink it after it has been allowed to reach its maturity and gain the maximum benefit from it. Generally, wines are cheaper when purchased by the case or in bulk.
Fine wine is relatively inexpensive and more readily available when it is young.
Once it has reached it maturity it is at premium if it is available at all. Some people buy a case of wine as an investment and once the wine reaches maturity, they sell off half of it and then drink the other half for free. Whatever your motivation, a wine cellar is worth the effort. For a wine lover, a cellar is a necessity. Fine wines are worth paying extra for only if you can store and eventually serve them in good condition.