I think you're right. Building the next twitter would require a huge gamble that's unlikely to pay off. But from what I can tell neither of Twitter, Facebook, G

I think you're right. Building the next twitter would require a huge gamble that's unlikely to pay off. But from what I can tell neither of Twitter, Facebook, Google started out with the intention to be the next big thing. All of them started as something much smaller and focused, even though they eventually grew into behemoths.