Billionaire financier George Soros has warned that the European Union is on the "verge of collapse" over the migrant crisis and is in "danger of kicking the ball further up the hill" in its management of the issue which has seen more than a million migrants and refugees arrive in the region in 2015.

In an interview with the New York Review of Books, Soros added that the German Chancellor Angela Merkel is key to solving the crisis.

Merkel led Europe's response to the migrant crisis, opening Germany to the refugees that had travelled from the Middle East, in particular Syria, to try and find a new home in Europe. The decision by the German leader marked a sea-change in her policy. In the interview, Soros said he welcomed Merkel's move.

"There is plenty to be nervous about," the financier said.

"As she (Merkel) correctly predicted, the EU is on the verge of collapse. The Greek crisis taught the European authorities the art of muddling through one crisis after another. This practice is popularly known as kicking the can down the road, although it would be more accurate to describe it as kicking a ball uphill so that it keeps rolling back down."

"Merkel correctly foresaw the potential of the migration crisis to destroy the European Union. What was a prediction has become the reality. The European Union badly needs fixing. This is a fact but it is not irreversible. And the people who can stop Merkel's dire prediction from coming true are actually the German people. "

"Now it's time for Germans to decide: Do they want to accept the responsibilities and the liabilities involved in being the dominant power in Europe?"