Considering many central banks are moving towards zero or negative interest rates there's a significant cost to hoarding cash. But as you say it is a good strat

Considering many central banks are moving towards zero or negative interest rates there's a significant cost to hoarding cash. But as you say it is a good strategy for individuals, it's not a good universal strategy - see https://en.wikipedia.org/wiki/Paradox_of_thrift https://en.wikipedia.org/wiki/Paradox_of_thrift