Un-invested cash loses value, as a result of changing conditions, inflation, currency re-evaluation in relation to other currencies, etc.
Only the stupid sit on their holdings.

Koch is a good example of a company, private it may be, that knows how to invest and progress.
Koch produces 800,000 bbl oil/day. Its company ownerships includes fertilizers, polution equipment, forest, pipeline, financial trading, fibers and polymers, paper and ranching entities among others, either in whole or in partnerships.
It has some 85,000 well-trained employees to handle its operations.

Its revenue in 2007 was $98 billion; I have not looked into its profit share or what was necessary to the operation of its many businesses.
Data from Forbes, NY Times, etc.

The company has a poor rating on environment, with fines for spills and other shortcomings, lobbys for oil and gas interests, maintains several conservative think tanks and contributes to conservative politicians.