Maybe tell them you actually only posess this one currency called Bitcoins and you would want to pay the fine with it.
Although I never felt fearful during the entire ordeal, I did opt to not mention Bitcoin. The last thing I wanted was to start a conversation about a virtually currency and
overthrowing disrupting the global banking system. I'm sure those country yokels would have loved to be able to tell their friends the next day that they nabbed a terrorist with a pocket full of money and you should have seen all the FBI, CIA and NSA agents at the PD last night.
At one point, I was asked if I had any aliases. I told them only Bruno and Junior and one guys calls me Mr. B. I asked if she meant on the internet and she snidely remarked that she didn't want to know. (Al the Alpaca finally caught a break, for I was about to spill the beans on him. Then again, if I had, they would have found out about Bitcoin.) Therefore, at this time it seems that law enforcement is not concerned about online aliases. But when will the day come when that will no longer be true. (thought actually went through my mind when she brushed the question aside)
Another observation. Whatever entity is manufacturing latex gloves for law enforcement worldwide, is making a killing. After each use, they're disposal of in a special container marked for gloves only. HazMat?
~Bruno~