Money can only be used to exchange stuff when it has value. And it has value only when people are willing to hold it. If no one wants to invest in money long-te

Money can only be used to exchange stuff when it has value. And it has value only when people are willing to hold it. If no one wants to invest in money long-term, then it has no value and thus cannot be used in "exchange". After all, money does not "move", it is always stored in someone's pockets and switches owners instantly. It's just everyone has different time preferences and stores different amounts of cash for different amount of time.