SNB surprisingly removed the currency peg with Euro without any formal information or indication. This is a very strange move that never happened in major developed countries. It seems that they have totally lost control of their pace and don't care about causing shocks in financial markets. It might be a decision made in panic, since it is nothing comparing with something very gigantic that is approaching
This chart shows that the current fiat money system works totally different since 2008

Base money supply increased by 8 fold without any significant increase in GDP. This scale of money supply used to be in M1 (which is only checkbook numbers in banks database. e.g. virtual wealth by just count the same money multiple times), but now it is in M0, with a large amount of debt backing. How could you pay back 8x more debt without your income increase by 8x?
Maybe they are already seeing the total collapse of the debt bubble and want to quit the money printing game first