Easy money leads to unsustainable growth. It disincentivises profitability and incentivises the emergence of monopolies (or monopoly-like entities). Monetary policy (printing money and lowering interest rates) have acted like industrial grade fertiliser in the field of business. A intended manipulation which has short term benefits but just as the depletion of the soil in farming, it might very well have detrimental effects on the sustainability of the business ecosystem.