Many of the founders of the technology companies will be a career after the job.

But Http://www.aliyun.com/zixun/aggregation/1560.html ">facebook's founder and CEO, Zuckerberg, has not shown this sign.

The reason for this may be that it takes a lot of effort to be responsible for a social networking site with 1 billion of users.

In this respect, Zuckerberg is just like Steve Jobs. Jobs is also known for his focus. After selling Pixar to Disney, Jobs focused all his energies on Apple, the time when Apple rose on the iphone.

That is why Zuckerberg did not choose to make investments that day. If engaged in the latter, may invest 1 million dollars, earn back 100 million dollars. The cost is that the venture is profitable to invest.

But Zuckerberg doesn't have to. He runs a company worth 10 billion of dollars, and it's not worth the effort to spend 100 million dollars.

So Zuckerberg is just concentrating on being CEO.