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Investment wine, like gold bullion, rare coins, fine art, and tulip bulbs, is seen by some as an alternative investment other than the more traditional investment holdings of stocks, bonds, cash, or real estate. While most wine is purchased with the intent of consuming it, some wines are purchased with the intention to resell them at a higher price in the future. A wine's value often goes up as time passes and consumption increases as the market becomes tighter and access to good wine is more elusive.
https://en.wikipedia.org/wiki/Investment_wine
Oenophilia (/ˌiːnəˈfɪliə/ EE-nə-FIL-ee-ə; Greek for the love (philia) of wine (oinos)) is a love of wine. In the strictest sense, oenophilia describes a disciplined devotion to wine, accompanying strict traditions of consumption and appreciation. In a general sense however, oenophilia simply refers to the enjoyment of wine, often by laymen. Oenophiles are also known as wine aficionados or connoisseurs. They are people who appreciate or collect wine, particularly grape wines from certain regions, varietal types, or methods of manufacture. While most oenophiles are hobbyists, some may also be professionals like vintners, sommeliers, wine merchants, or one who tastes and grades wines for a living.
https://en.wikipedia.org/wiki/Oenophilia
A wine auction is an auction devoted to wine, sometimes in combination with other alcoholic beverages. There are two basic types of wine auctions: first hand wine auctions, where wineries sell their own wines, and second hand wine auctions, arranged by auction houses or other auctioneers to make it possible for any owners of wine to trade it. In most cases, the wines traded at wine auctions are collectible wine, so-called "fine wine". These are wines which are typically suitable for extended cellaring, and where some of the buyers are looking for mature wines which are no longer available through first-hand retail channels.