$50B sounds realistic.
Snapchat is a $33B company, with 30% yearly revenue growth and similar demographics to TikTok.
TikTok has a lot more active users than Snapchat and is growing much faster. It's the only non-FB app in the global top 5. That alone makes it an attractive investment as a hedge.
Take a look at the stats: https://mediakix.com/blog/top-tik-tok-statistics-demographic...