Word is Musk is offering to buy a controlling stake as well. The whole thing is a racket though: ByteDance is already 60% owned by global institutional investors, including firms such as Blackrock, Susquehanna International Group, Carlyle Group, and General Atlantic. Another 20% are owned by employees, and another 20% by co-founders. Given this, I'm not sure how ByteDance could "sell TikTok" to an US investor - they don't own 50% of it themselves.