 They provide a relatively low risk option for investors looking for a place to park their money, especially in uncertain economic times.Inflation, stagflation, recessionary fears and stock market volatility are among the economic indicators that have encouraged more and more investors to consider cash as a way to balance their portfolios.In fact, more than 8.5 million customers signed up for OSAs with leading U.S. banks in 2005 alone, and some industry experts estimated the online savings account market would triple in size, from $250 billion to $400 billion by 2010.