Again no one is keeping their money under a mattress. Even money in assets is not unused. Surely the fact that Apple's stock is worth a bazillion dollars has

Again no one is keeping their money under a mattress. Even money in assets is not unused. Surely the fact that Apple's stock is worth a bazillion dollars has some utility to the company? If they sell stock they must be using it for something. If I buy the stock and it goes up - even if I'm not buying it from Apple - it makes things easier for Apple.