Most importantly also the magical unicorn method for sending USD- I think this is the answer Jorge deserved for this simple question- hence that is why I gave that answer to start with.... y'know what they say "ask a stupid question, expect a stupid answer"
But, have you checked how expensive is to rent a magical unicorn these days?

insert its happening gif

, its cheaper than you think source:
http://www.complexmag.ca/tech/2014/01/businessweek-bitcoins-unicorns-cover

but seriously Jorge the image above is considered so obvious it isn't worth considering, it is insulting to reduce working of fiat to a bank to bank transfer to just a "Bank Transfer" is overlooking how the system works, behind the scenes there are layers of corruption of the highest magnitude*.
what actual happens between the money transmitter and the money exchanger looks more like this and it happens again on the other end between the money exchanger and the bank:
*trust in the existing system is eroding still.
http://www.rollingstone.com/politics/news/everything-is-rigged-the-biggest-financial-scandal-yet-20130425