Recent developments have made private digital currency possible.  Any digital money must prevent users from spending their balances more than once, easier said than done with purely digital currencies.  Current and recent digital currencies use peer-to peer networks and open-source software to stop double spending.  This paper explains how the use of these technologies can be equilibrium strategies.  This paper also discusses the rise of 24/7 trading on a computerized market in Bitcoin, a remarkable innovation in financial markets. 

- Where countries stand in their treatment and attitude towards Bitcoin.
http://www.forbes.com/sites/kashmirhill/2014/01/31/bitcoins-legality-around-the-world/

- New exchange startup for Dogecoin in Brantford, Canada
http://www.brantfordexpositor.ca/2014/01/31/bitcoin-exchange-launches-in-brantford

- If Bitcoins treated like currency and assets, expect regulation, and KYC AML requisites
http://www.cnbc.com/id/101380040

- SmartMetric's card is the world's first biometric, fingerprint secured, off-line storage platform for bitcoins.
http://www.marketwatch.com/story/smartmetrics-payment-card-can-help-bitcoin-surpass-top-payment-networks-in-volume-2014-01-31?reflink=MW_news_stmp

- Using bitcoins for reading articles - Chicago Times
http://blogs.wsj.com/moneybeat/2014/01/31/read-all-about-it-sun-times-experiments-with-bitcoin-paywall-on-saturday/