All worldly things besides very few exceptions have the feature to lose their value. Only money escapes the law of time. But money, too, like all other things has to be subjected to losing its value.
In comparison to all other things money has royal rights. Since money has such a power, it is very sought-after by people. Money enables any exchange and thus it aquired unlimited liquidity. It became a mechanism which gives the advantage to those who provide the money. The theory of Marx cannot be put to practice, because in his theory money is just a means of exchange, he was not able to solve the secret of interest. But when we today see money as it really is, we understand the necessity to reform our monetary system. Contrary to Marx we have to make money a real means of exchange, which has this function only.