There is a large dotcom bubble fueled by venture investment funds, investors who are dragging other investors to continue investing until they can sell shares of the company and recover leveraged money, but the last holder of shares is going to lose.
Many technology companies, without having a concrete business model (supposedly will generate revenue from advertising and premium subscription accounts) receive millions of dollars in funding to offer something free, acquiring fastly a large mass of captive users as if they had made them addicts, and then, the exit strategy (for investors) is to get someone to buy the company at a staggering figure, as did Blogger, Fotolog, MySpace, YouTube, Skype, Bebo and others. They are like continually inflating balloons and they need to find a buyer before they explode. If they can not find a private buyer for the entire company, the investors had the strategy of going public, to start trading its shares on the New York Stock Exchange, they turn those pieces of paper (shares) in real money, they get thousands of buyers purchasing lower small parts (shares).
See as sample: Steven Loeb from Vator had published the article "Was WhatsApp really worth the USD19 billion price?" (Feb. 2014)
Twitter 1st Quarter 2014 Results: net loss of USD 132 million!!!
What comes after the Social Networking wave?
The Next Big Investment Opportunity on the Internet will be .... Personalization!
Personality Based Recommender Systems and Strict Personality Based Compatibility Matching Engines for serious Online Dating with the normative 16PF5 personality test.
100 times (not 100%) more powerful than eHarmony's matching algorithm or any other site.