Social media trends come and go, but some can have real financial and security implications. The latest viral trend on TikTok — the "Door Knock Challenge" — has many homeowners on edge.

Content creator Cindy Baibe opened the doors to her mum's house and bragged about giving her mum a good life with the money ...

But sometimes it sparks a bit of magical positivity. It actually can bring people together. Take Buddies Coffee Roasters in Williamsburg, Brooklyn. Owner Rachel, TikTok handle @its.rachel.rose, posted ...