I once got a troll who read something about me and tweeted, 'The only thing I want to read about you is your obituary...' my comeback, 'well, at least I'll get one mate!' – that accepts his position (that he only wants to read my obituary) and turns it back at him without aggression. That's how you have to do it, that's the basic rule.

In my view, all the big existential risks are anthropogenic, arising out of human activity. More specifically, the biggest existential risks in this century arise out of anticipated future technological advances.

When you engage with highly successful individuals who are open and honest about their journeys, it's invariably surprising to learn how much they attribute their achievements to good luck and favourable circumstances.

In the future people will spend the majority of their time online, with their online identity and digital assets. The majority of their interactions with friends, family, relatives and colleagues will be online.

Entrepreneurs and founders have to learn to be the most adaptable people in their business- that's really important – otherwise, the business will outgrow the founder, or the founder will cause the business to stagnate or slow.