Im aware of all the tongue in cheek comments about bluetooth. but no. Bluetooth is clunky. Wifi is ubiquitous and has a bigger range. Use case? Let say person 1 wants to share with person 3, but person 3 is out of range. Fortunately, person 2 is in between and is in range of both, so the "app" just finds its way hopping between nodes. Networks can be created on demand. Thats what I mean by "decentralized sharing".