I’m loathe to suggest any, lest they become a self-fulfilling shopping list prophecy!
Certainly the ones at risk are the highly talked about and generally lauded around these parts, often the first ones named if anyone says “what should I try in XYZ region?”. In time this can risk they are the only ones named, because few of us have a breadth of knowledge in specific regions, and it’s easy to remember just 2-3 names that we end up repeating ourselves.
We saw a recent trend back towards tradition from a heavily oaked and fruit rich style, that’s arguably stronger internationally than in the home country of the wine itself (Barolo/Barbaresco come to mind). That saw a number of traditionalists seeing their prices catch up with the likes of (picking a few random names) Scavino, Clerico & Sandrone. Spotting the next trend might help, probably not natural wines, but maybe those actively reducing alcohol levels as is seen in Australia these days.
Predicting the ‘100 pointer’ from leading critics would help, as there is still very clearly an active flock of points followers that can double or triple the cost of a wine in a single vintage.
Then there is the elder statesman/woman, who have happily made fairly priced wines for decades, but a public recognition (as in the case of a knighted good trad Barolo producer) seems to grant them a huge boost. Plus when such a figure retires or dies, there can be an increase in demand for wines made by them.
Personally I’m keen to not get caught up in any ‘buy before it becomes too expensive’ hype, which seems to have caught Burg fans out, and Barolo/Barbaresco have seen similar hype recently. I’m not buying to resell, so the price I pay is what’s important, not how much it will be when I drink it. Time will undoubtedly make some wines I like, or would like to try, too expensive, but there will be plenty of other interesting wines, more than I’ll ever get close to tasting.
I suppose the one message I should take away, is if you like a wine, buy a few bottles of it. That might sound blindingly obvious, but I like tasting a broad range of wines (a vinous butterfly if you like), so sometimes I forget to go back an buy more of what I always find a joy to drink. With an intentionally limited space for wines, there is always compromise between the new and the familiar.
Regards
Ian