The big benefit of TikTok is that it allows users to dole out and obtain information in short, easily digestible video bites. And that can make unfamiliar, complex topics, such as those related to personal finance and investing, more palatable to a younger audience. But can TikTok users, many of whom are in their teens, 20s or early 30s, trust the financial advice that is increasingly being offered on the social-media platform?