According to the latest top websites rankings from Semrush, Reddit is the 2nd fastest-growing among the top 10, behind GPT.
Reddit is currently the 6th-largest site in the world, and the 5 ahead of it are the core of trillion-dollar companies (Google, Meta, and maybe OpenAI).
At current growth rates, Reddit could soon become the 4th-largest site, behind Google, Youtube, and GPT. The hardest part of building a business is establishing the user base. Once that's done, monetization is much easier.