the security features you are describing are not inherent to the currency itself but depend on the issuer (except for counterfeit protection which is not related to security per se, though it is certainly an important, crucial feature of stores of value). That was the point I was making.
I put 'backing' in quotes to signify that this is not really to be considered as a backing feature. Anyone with reading comprehension skills above 10th grade should understand that.
So your trying to throw the power of the nation-state out the window and just looking at a Dollar as a piece of printed paper? If you want to make that comparison then BitCoin is a file in your computer and nothing more. If your going to compare the raw OBJECTS of the currencies then do that (and if you did paper is more durable then a computer file), but if you want to compare SYSTEMS and PROTOCOLS with each other then you need to look at the full Protocol and the full issuing agent, in the Case of BTC it's every mining computer and node in the world that is the issuing and security providing entity, in the case of a National currency it is ALL the currency protecting and security activity conducted not just physical printing security features. Every national currency is protected by a well established set of legal and political practices, that are as much a part of thouse currencies as the BTC protocol is a part of it.