1. Disappearing Act

Yahoo has agreed to acquire Blink, a mobile app that lets you send self-destructing messages à la Snapchat, for an undisclosed amount. And soon Blink will pull off its own vanishing act: Yahoo plans to shut down the year-old startup. It's yet another deal where Yahoo prizes the people over the product.--TechCrunch 

2. Big Bitcoin Bet

BitPay, the Atlanta-based bitcoin merchant processor, raised $30 million in Series A funding, boasting the largest-ever funding round for a bitcoin company. The round was led by Index Ventures, and included Yahoo founder Jerry Yang's AME Cloud Ventures, PayPal founder Peter Thiel's Founders Fund, and Virgin's Richard Branson.--CoinDesk

3. King of the Trolls

A new study from legal analytics firm Lex Machina found that Apple was the most frequent target of patent lawsuits in 2013, followed by Amazon. A group of 10 patent trolls--or patent monetization entities, as they're also known--were responsible for a stunning 13 percent of the 6,092 patent infringement suits filed last year. With 137 cases, the worst offender was Melvino Technologies/ArrivalStar.--Bloomberg

4. Round 3 Gets Rough

In a bit of a reversal, startups are having a hard time getting financing from VCs, but more established companies looking to grow are raking it in. Very young companies have plenty of new options, the investors' thinking goes, but access to a sizable "C" round can go a long way toward establishing a winner in an industry.--San Jose Mercury News