Let me be honest. I think Tik Tok sucks as a social media or network. Many people don't like it because of the content. But, if you want to develop an app like Tik Tok then go ahead there are so many challenges. Tik Tok handles a ton of traffic but you will never see any buffering videos or qualify loss that makes that app unique.
As a developer, you might need to do things people don't like but it can make a lot of money choice is yours.