hehe i think most of you already know lah... anyway in my opinion it's obvious from those links below..

what kept sgd high during that period of 2009- late 2012... remember all time high sgd 1.23 against USD sometime in 2010-2012?
http://www.huffingtonpost.com/diane-francis/dirty-money-flees-swiss-b_b_266272.html
http://www.bloomberg.com/news/2013-04-29/billionaires-flee-havens-as-trillions-pursued-offshore.html

and here's why i think SGD has fallen so hard these days...

http://www.indianexpress.com/news/money-laundering-banks-in-singapore-face-the-heat-over-accounts-of-tax-evaders/1112088/
http://news.xinhuanet.com/english/world/2013-07/12/c_132536971.htm

so that should sum up everything... i could dig up more articles but i think that should get you started on your own...