And you are going to explain that to a federal judge?
I was not able to find anything else on the currency law besides this...
Section 19...
http://www.constitution.org/uslaw/coinage1792.txtSo to apply this to "modernity", the crime here is debasement of US dollar and the "conspiracy" is involvement of everyone to commit just that.
debasement is normally confined to physical alteration of a minted coins or printed bills - Bitcoin is an alternative barter / security mechanism and it would be quite a stretch to argue that Bitcoin's primary purpose is to devalue normal currency.
People mint private silver and gold coins, and as long as they are not purposely imitating US currency their is no issue. Bitcoin would have an even more tenuous connection due to it's nature. I would be happy to argue this in front of a federal court