Savings are a necessary pre-requisite for investment. On balance it is better to have savings than debt. Creating bubbles in certain asset classes is usually

Savings are a necessary pre-requisite for investment. On balance it is better to have savings than debt. Creating bubbles in certain asset classes is usually the fault of differential tax or regulation treatment for that class. It can be avoided by not creating special classes. The story of savings being stuffed into mattresses is usually followed by some type of incorrect Keynesian thinking. It's so rare that it is not a problem. A 'general glut' as it used to be called has nothing to do with hoarding savings.