Billionaires increased in numbers and overall wealth last year, Swiss bank UBS (UBSG.S) said on Thursday, with the fortunes inherited by the newly-minted super-rich exceeding cash generated by self-made billionaires for the first time in years. The number of billionaires rose 7% to 2,544 people globally, while their total worth rose 9% to an estimated $12 trillion. The heirs of baby boomers and older individuals built their wealth after the financial crisis, boosted by low-interest rates that disproportionately helped them
