"If something can't be explained on the back of an envelope, it's rubbish."

You may also like:

• 

  Alan Sugar
  Business person

• 

  Bill Gates
  Investor

• 

  Donald Trump
  Investor

• 

  Elon Musk
  Investor

• 

  Jeff Bezos
  Entrepreneur

• 

  Larry Page
  Business magnate

• 

  Mark Zuckerberg
  Programmer

• 

  Steve Jobs
  Entrepreneur

• 

  Warren Buffett
  Investor