This year, it has grown from almost nothing to 15 million DAUs.[1] It tripled in DAUs from July to August.[2]

This market resolves as positive if the best source I can find on January 1 (likely AppTopia) indicates BeReal having at least 30 million DAUs.

1. https://www.ft.com/content/c19c486f-8cf2-4b74-a82b-978c45e2266a

2. https://www.businessofapps.com/data/bereal-statistics/