Then please explain por favor how it works.
1) The fact that a wine is expensive does not necessarily mean that it is of high quality.
2) In order to avoid degradation, wines need to be stored properly - not just stuck in a closet and forgotten. A ruined wine is worthless (except in very unusual circumstances).
3) Wine prices are wholly dependent on market over age. There are countless examples of old wines that are not in demand, and therefore remain at a mid-tier price.
4) Different wines have different ages at which they are best - red, for example, even at the highest quality vintage, usually maxes out around 10-12 years. Ports store longer, whites shorter. Depending on original quality and, again, method of storage.
5) Limited production wines will typically gain significant value in their first one or two years, and then plateau.
6) Novice buyers are very susceptible to forgeries which a sommelier, or experienced amateur, wouldn't touch in a hundred years. Even if you stored it that long.
Kay?