While being anonymous does have alot of benefits, but using a currency or money i dont think its a
Bitcoin is to be the equivalent of gold, but digital. The things that made gold the standard for money in times past was that it was easily recognized, divisible and was mined from the earth at a set rate.
http://www.youtube.com/watch?v=9LaSrxtWfgc
If you can give someone a dollar, a euro, a yen ( and so forth), pay with it, and walk out of the store without giving a name or number, that means it is generally accepted as "money". Money is just a means of transfer.
The reason it is bad when groups control the flow of money is because men can not handle too much power.
(https://en.wikiquote.org/wiki/Henry_Kissinger)
These folks start thinking that they are God's gift to humanity, all the while deceived with their own arrogance. They literally are addicted to power. If they somehow lost it I am quite sure they would commit suicide.
But, back to the point. We are created free and independent. We should have money to use that reflects that same truth. That is, it should free and independent.
If you meet some stranger on the street, there should be no external pressure for you to give your name if you dont want to. It should be your choice.
You should be able to choose your own social groups. If it is evident that the stranger does not have your best interests at heart, and you are forced to give your name, ( by a small group of people you do not even know) you will suffer.
Small groups of people should never control the flow of money of large groups of people. History has sadly shown that they can not be trusted to do what is right.
In conclusion:
I dont know where that quote came from, but if it rings true in your own heart... you should continue to use bitcoin.