The rich will keep getting richer: 300 wealthiest people in the world are more than $500 billion better off than this time last year, and Bill Gates is back on top
- Top 300 billionaires add $524 billion to their net worth in 2013
- Total wealth of world’s richest people stood at $3.7 trillion by end of year
- Biggest gains for technology bosses, whose wealth rose by 28 per cent
- Bill Gates’s riches increased by $15.8 billion to $78.5 billion