Warren Buffet, Optimist

Not as downcast as some:

Buffett, one of the world's wealthiest people, appeared to see irony in the fact that many of the banks who marketed complex investments which have now crashed are bearing much of the fallout.

"It's sort of a little poetic justice, in that the people that brewed this toxic Kool-Aid found themselves drinking a lot of it in the end," he said.

Buffett, a legendary investor who has amassed a huge fortune through plays in a wide range of industries, has bet against the U.S. dollar in the past.

In 2005, Berkshire had made a $21.8 billion bet that the U.S. dollar would fall. It later unwound that successful position as it found other non-U.S. investments.

Buffett said on Wednesday in Toronto that the turmoil that has rocked the U.S. economy in recent months has imbued the markets with a healthy degree of caution, while the rate-cutting response from central bankers has ensured that cheap money remains available for borrowing.

"I wouldn't quite call it a credit crunch. Funds are available," Buffett said during a question and answer session at a business event. "Money is available, and it's really quite cheap because of the lowering of rates that has taken place."

He added: "What has happened is a repricing of risk and an unavailability of what I might call 'dumb money,' of which there was plenty around a year ago."