It depends on what kind of economy you are in. If you are Turkey and you are struggling with a lack of domestic savings because everyone tries to keep their capital safe then you must do more investments than you can afford to keep growing. The lack of savings drive up the interest rate and ultimately put a stop to growth or slow it down significantly.
The US isn't in this position, it's a mature economy that keeps outsourcing the easy work to other countries, relative to investments there is too much in savings and those savings are in the bank accounts of corporations who would invest, if they saw a reason to do so. Assuming another fall in inflation, there won't be any reason to put the money to good use. If inflation rises over time and stays at slightly above 2% then those savings will be eroded because they can't lend the money to anyone to obtain interest, they'd have to lend the savings to themselves, or to consumers (bad idea unless they start a company). If companies fail to invest in anticipation of inflation, then the people who receive the fresh money will get to spend it, which will drive demand for products and therefore demand for companies to invest their savings into more production.
