What gives SWARM coins value?

Does anyone know?

This may help: http://swarm.lefora.com/topic/71/Swarm-Profitability#.VFwSVK1Y_9I

It seems holding SWARM gives you some small amount of each coin issued through the project.

Thank you weex.  Interesting concept.  Is the “coinshare” well-defined or subject to change?