http://abneyassociates.org/2013/04/09/understanding-bitcoin/

Bitcoin is a form of Internet money that is immensely trendy and greatly appreciated means of buying and selling on line. And this is a currency that barely anybody understands. Various companies exclusively accept Bitcoins. The truth because of the recent banking instability in Cyprus it became so enormous that the worth of “all outstanding Bitcoins” just hit $1 billion.