The current European debt crisis likely will not end until the euro collapses as a currency and takes the entire European Union with it, said Dennis Gartman, hedge fund manager and author of "The Gartman Letter."

Protestors escape tear gas fired by policemen in Athens.

"I think the whole thing will go down to defeat, the whole thing will eventually unravel," Gartman said in an interview with CNBC.com.