I think the super aggressive referral system has a chance to make the price of Manna raise by a huge factor. A lot of people will sign up friends and family. Small groups like this will start using it first. These small groups will network together and create the "network-effect". Because so many people are using the currency it will gain tons of value.

In the grand scheme of things, figuratively no one is actually using Manna yet. Give it a few years.