Somewhat interesting argument about Bitcoin in the Fad section of newrepublic
http://www.newrepublic.com/article/115801/bernankes-bitcoin-comments-signal-growing-acceptanceThe price of bitcoins has taken flight because investors believe that people will eventually see the advantages of virtual currencies and scramble to acquire them for their virtual piggy banks.
The money supply is determined by votes cast by people who know nothing about monetary economics and little about the economic conditions that justify modification of it.
The key security problem introduced by bitcoins is that bitcoin makes a huge amount of money available to people on devices that they carry around with them or leave unsecure in their homes and offices, and thus makes those people juicy marks for criminals.
Also some economics
http://www.scribd.com/doc/188644617/Bitcoin-Intrinsic-Value-Wedbush-Report-December-2013
