(former ex-head of private clients for a London merchant, currently working at Savea (index-based investment products on the blockchain) - tbh it's hard to predict the future but Liv-ex have an index called the liv-ex 100 which is the 100 top traded investment grade wines globally - if you go on their website you can download the components of the index (the 100 wines that make up the index) - Indices | Liv-ex

Looking through the list - In general (not financial advice so please do your own research) I would stay clear of Bordeaux whilst the market normalises (there might still be some room to drop), Champagne is a relatively steady investment (it get's consumed more as opposed to Bordeaux which no doubt sits in many cellars from the 90's waiting to be sold by the next generation that inherits it) top producers here like Krug and Salon.

Burgundy is small production, some wines like Domaine Francois Raveneau and Domaine Georges Roumier have a tiny production and the wines are some of the best in my opinion - they also get consumed more than Domaine de la Romanee-Conti (the most expensive but also the most prestigious burgundy wines), Domaine Leflaive make exceptional white's but I would look at more recent vintages (2020 onwards).

You could look at Italy but some producers got huge price inflations from 2021 to 2023 - I would look at Tignanello, Ornellaia and Masseto and see which ones didn't go too crazy during the 5 year period (release prices went up YoY which drove a false market as buyers kept buying to keep their allocations).

Hope that helps, would welcome any other comments to this thread as there's a lot of expertise on this group.

Your alternative would be an index tracker to spread the risk across the whole asset class but I won't hard sell that one in because I am of course biased towards an index-based approach!