One of the primary purposes of a profit is to provide funds during downturns in the business cycle. Often referred to as the economic cycle, there are two types of cycles. The first is industry related. The second is broader in scope and is economy wide.
Economy Wide Cycle
The economy wide cycle is the natural fluctuation of economic activity referred to as expansion of the Gross Domestic Product and downturns known as recession. Each industry responds differently to the economy wide cycle.