The prediction that Birkin bags will appreciate in value over time is accurate. Data from early 2026 indicates consistent price increases at both retail and resale markets, with Birkin bags outperforming traditional investments like gold and the S&P 500. For example, Birkin bags appreciated 92% on the resale market over the last decade, and Hermès achieved 138% average value retention in 2025. Retail prices have also seen significant annual increases, with the Birkin 25's price rising from $9,400 in 2016 to $13,500 in 2026.