Jim Rogers,

Has an impressive resume. For those that don't know him here is his Wikipedia page
Jim Rogers
As you can see he has had quite the career, even partnering with the infamous Soros in the 70's. Making 4200% gains on their portfolio which was one of the first global funds.
In any case he just did an interview with Henry Blodget of Business Insider recently, saying that he believes that the largest stock market crash in his life time will hit this year or next.
He did call the GFC right, stating he was short Fannie Mae in 2006... amongst many other right calls over the years.
His reputation is equal to the heavy weight Warren Buffett.
Buffett a staunch Fed supported and Rogers not keen on the Fed or Fiat currencies but rather a precious metal man.
In his latest call, he says that not just markets will fail but also governments and countries.
With a reputation like his, he has a lot to lose and little to gain by making such predictions.
And these are big predictions, so lets see.