For every deal that the billionaire entrepreneur follows through on, there are any number of publicity-fuelled stunts that subsequently fall off the radar unfulfilled.

The 47-year-old billionaire entrepreneur insisted in the interview that he knew 'exactly' what to do.

Still, not many billionaire entrepreneurs personally deliver their own rants down the line.

It has also proved a disaster for its billionaire founder.

But the billionaire founder of a personality-driven centre-right movement told his party this week that he would take charge of the next election campaign.

When you lodge a complaint with an upmarket car manufacturer you do not usually expect its billionaire founder to step in and personally cancel your 90,000 order out of spite.

As news emerged of the departures of two top executives, the billionaire founder and head of the electric carmaker issued a memo explaining the shake-up.

The billionaire founders of one of the world's oldest and most influential private equity firms have announced plans to hand control of the business to a new generation.

He accused it of price fixing and tax evasion and made veiled threats against its billionaire owner, who was in hospital.

But they are a basket-case, run on the whims, impulses and fantasies of their billionaire owner.

And, for once, the supporters listened to the larger-than-life billionaire owner.

The reluctance of the club's billionaire owner to discuss his motivation has added to the uncertainty, however.

It's not just a billionaire owner throwing money at the club.

We know of him as billionaire philanthropist.

A few billionaire philanthropists could come in very useful after that - but have you ever known a super-rich benefactor who didn't want 'a say' in how things are run?

Such tasks seem ill-assigned to the order of logicians, being better left to novelists, messiahs, cosmologists, billionaire philanthropists, and positive psychologists.

I was excited about the type of character traits that lead a human being to be a self-made billionaire in his twenties.

Now 26, he's the world's youngest self-made billionaire with 4.5billion.

Oh, and a self-made billionaire to boot.

They never know what it's like to be on the dole, or a teacher, or a self-made billionaire.

As the world's youngest self-made billionaire, he was worth $1.25 billion, over $900 million more than he'd been worth the year before, when he'd debuted on the list.