(Being married to a Buddhist and having gone to temples numerous times I can tell you that no Buddhist would want their symbols associated with a financial instrument. It goes against the Buddhist maxims. That is another reasons a religious symbol like a Dharma wheel or a lotus flower would be a mistake. Because it would only be attractive to those who don't really know what those symbols mean.)
you might be married to a purist who does not believe in material things but to say that all Buddhists reject the idea of linking symbols with money is completely false. There are many different schools of thought with many different positions on money. yes of course devout monks DO reject all forms of money and materialism but that has never stopped coins covered in Buddhist symbols from being created by Buddhist kingdoms and even temples.
in history there are plenty of coins with Dharma wheels, Swastikas, Lotuses, Bodhisatvas, the buddha himself.. all over them.. I even have some Buddhist temple tokens in my (real) coin collection...
I would argue that any purist (of any belief system) who does not believe in materialism would have no need for KarmaCoin at all and so would probably be one of the last people on earth to use it.
As I said in my open letter.. people are confusing Marketing Logos with Currency. they are not the same thing and it would be mindful to consider both when voting.
here is a coin from the modern buddhist kingdom of Bhutan you can clearly see the swastika and dharma wheel
here is an old tibetan coin where you can see the 8 fold lotus and Dharma wheel
this I think is an ancient mauryan coin showing a bodhisatva or buddha..
and woah here is one coin from sri lanka which has the Dharma Wheel, Buddha and a Lotus' all on the same coin!