"Sell everything except high quality bonds. This is about return of capital, not return on capital. In a crowded hall exit doors are small." -The Royal Bank of Scotland, January 2016
Were given the stats on the financial compensation scheme, basically it only has assets to cover one major, and two smaller, bank runs. But as the banking system is intertwined it will be a domino effect, that is what they mean. If Greece goes it will damage the German banking system likely beyond repair but completely take out the Italian and Spanish banks, which will ripple throughout the world. Are told this will happen within 1-2yrs!
I "was told" this was going to happen in 1-2 months back in 2010 when Greece was supposedly about to go with capital controls and riots in the streets, and the Greek banking system was far more intertwined then than it is today. In other news, the rapture is also still imminent.