Taking a detour in your presentation to try to bridge the divide between bitcoiners and goldbugs/silverbugs might be a good idea. Specifically, describing how bitcoiners can present Bitcoin to metalbugs positively, since a lot of the hostility seems to come from them (even though for most of their needs, bitcoin fits very well.) Maybe detailing how you became convinced that Bitcoin was worth getting involved in?
And BTW, I really enjoy the service you guys offer. I just recently pointed out to a group of silverbugs that you're one of the few solid bullion dealers who accepts bitcoins, and a couple of other cryptocurrencies as well. Kudos!