Angry Birds is one of the fastest-growing online products I've seen, growing even faster than Skype, and the company has done a brilliant job of extending it across different platforms and merchandise.

If you want to be an entrepreneur, it's not a job, it's a lifestyle. It defines you. Forget about vacations, about going home at 6 pm - last thing at night you'll send emails, first thing in the morning you'll read emails, and you'll wake up in the middle of the night. But it's hugely rewarding as you're fulfilling something for yourself.

Another differentiator is that Skype is free and simple to set up, and it costs us virtually nothing for a new user to join the Skype network, which is why we can offer the service for free.

I hope that my investment into Atomico will become my best financial investment to date.

The way I saw it was, if I had the built-in following and the audience, but I also had the skill set of acting, that would shoot me to the top. Because there's so many good actors. There's so many good-looking people. But the X factor now is social media.

Stripe makes it easy for anyone, be it an individual or a small business or a large business, to accept credit card payments on the Internet. We want to give control to the user or the business to define what the experience looks like. We work on a website or a mobile app, or whatever between that.

I think that AI will lead to a low cost and better quality life for millions of people. Like electricity, it's a possibility to build a wonderful society. Also, right now, I don't see a clear path for AI to surpass human-level intelligence.

It's often taken for granted that the most dominant tech companies control the world's most important technology and communications platforms. Instead, the truth is that these giants run on top of the world's most important platform: the mobile communications networks.