Please explain the functional difference between "currency" and "medium of exchange".
A currency can be literally converted to another currency, while a medium of exchange cannot be converted to a currency. This happened many times during periods of fast inflation in the Brazilian economy. The Brazilian central bank had to convert the currency in circulation for another, otherwise there would not be enough currency in circulation to keep the Brazilian economy stable. Thus, BTC cannot be converted to another currency because it supply and circulation are not under the control of a central authority.
Moreover, BTC cannot be literally hold by an individual, while a currency can be hold in form of banknotes and coins. No person hold any BTC, but only a private password which allows them transfer some digits from one imaginary point to another. Without a computer with access to the Internet, that process is impossible to be reproduced.
If you think that Bitcoin was not meant to replace the functioning of businesses like Western Union, perhaps you could explain the
very first sentence of the very first thing ever written about Bitcoin by Sastoshi Nakamoto (the whitepaper):
A purely peer-to-peer version of electronic cash would allow online payments to be sent directly from one party to another without going through a financial institution.
The first sentence is describing the Bitcoin software allows payments being made using the Internet without the need of a financial institution to validate the transactions.
Which part you did not comprehend?
I would like to hear these "very precise details". If like me, you consider that the transfer of cash is itself not a criminal act, so that money laundering is not a real crime, that's one thing; but to say that cash does not "facilitate" criminal activities is a bit of a stretch... There is no difference with Bitcoin, since it functions (at least for now) just like cash, except on the internet. My point is that trying to argue with the US govt. that "Bitcoin does not facilitate criminal activities" will be a completely losing proposition, since they do believe that there is such a crime as "money laundering", and to the extent that one does believe in such a thing, Bitcoin is an excellent way to do it, obviously.
The subtext of all your comments is that you (and many others here) think that the US government can be persuaded to look at Bitcoin in a friendly way. Indeed they can, but only if it is bent to their will.
If you think that conceal or disguise money obtained from illicit trade is not a crime, then I am sure you are not properly informed about the current legislation of many countries.