Paul Volcker, 71
Chairman, Federal Reserve Board, 1979-'87; now a member of several major commissions, including one to reform banks in Thailand
"We're going to end up with one worldwide currency within the next 100 years.
"Over the next 10 to 15 years there will be a lot fewer currencies. Far more of the world will use dollars.
"We'll have crises and ups and downs. Some people will make some money and some people will lose some money.
"There are lots of reasons to be optimistic but there are a few challenges and threats on the horizon.
"There's lots of ethnic conflict. The potential for terrorism looms around the world. There's nuclear proliferation. These are the obvious problems for the next millennium."
