Alibaba can't buy happiness

Alibaba founder Jack Ma is worth $24-billion and his retail company is the largest in the world, so he must be feeling great. Apparently not.

"I'm not very happy," China's richest man said. "Too much pressure ... when you're the richest person everybody is surrounding you for money. Today when I walk on the street, people look at you in a different way. I want to be myself."

Ma might turn to philanthropy to end his "great pain".

"Spending money is much more difficult than making money," he said. He is looking at setting up a foundation to "spend money in an effective way, in a business way that can really help people".

That might be stressful too.

"The competition between me and Bill Gates: who can spend money more effectively," Ma said.