BitCoin is basically threatning that monopoly. It doesn't help when you want to 'revive' the world economy by scheduled printing from USA, through EU, to China -- when citizens can exit your inflation by going to assets like gold.
Or - even better - BitCoin. I have a few coins, it's difficult to shop around you know. It maintains the value, true. But it's cumbersome to oww, store, risky to exchange for cash, etc. BitCoin - this is XXI century folks!
So you have the biggest and most dangerous lie on the face of the planet where banks literally are in bed with governments - currency monopolies all over the world. Everything tied back to the USD. And then you have some smarta$$es right at your nose in Manhattan showing you big finger with their virtual currency.
There is no competition with currencies. It's not like before central banks were forced upon people's throats that you can choose currency to pay with or create your own. 300, 400 years ago, a prince, or just a merchant or a city could have issued their own currency. Have their own banks issuing it. That's competition folks. That's not why real powers running this world established central banks ages ago. They did it to have a total control over currencies, interes rates and economies.
You know how easy is to manufacture a crisis like the one we have had since 2007?
As easy as keeping interest rates artificially low for 15 years by a central bank issuing world reserve currency. Crisis, great money are made. War - even better. And then with war you get rid of all these issues like overpopulation, water shortages, other natural resources shortages.
In communist states the government regulates prices of everything. From a piece of bread to a car. At the end this causes the economy to suffer to much that there is no bread and no cars. Because by ignoring supply-demand curve for the products and just enforcing a price that seems 'fair' to the government, you make it too cheap for a producer to care to produce, or too expensive for folks to buy it. Pretty obvious, basic economics.
Ever wondered why somehow they never acknowledge this to work the same way for the most important price an economy has - the price of credit? It's not like the market forces, supply&demand, decide what the price of credit is (interest rates). This is decided by the Government - FED - Ben Bernanke decides what the price of credit should be. A buerocrat. Are you surprised there is a crisis? What type of capitalism is it anyway which has the most important price on the market - the price of credit - decided and manipulated by the Government?
BitCoin, gold, silver, all take it away from them. Hence they hatred.
Another example: if a bank wants to lend USD it has to adhere to the rate set by Mr. Bernanke.
But if I want to lend BitCoin, I can do it at whatever %/apr.
That's their monopoly broken right there.
If they print too much to 'help the economy' (their friends in big banks) it won't work if guys will start using BitCoin. to trade and do other transactions.