Check the full post for speculation about reasons why Google won't acquire Twitter
"And, of course, Google has about $70 billion in cash lying around, more than enough to pay a premium for Twitter, whose price is so low that it is seen as a bargain.Three Reasons Why Google Is Unlikely to Buy Twitter | Re/code
It’s been an open secret in Silicon Valley that Google has kicked the tires on Twitter before — as has Facebook. But the last truly meaningful conversation between the two companies was around two years ago, before Twitter went public, according to sources familiar with the companies.
Still, that talk has gone nowhere, and there is good reason for that. Despite the seemingly natural fit, there is a just as strong if not stronger case that Google should not make the move."