Can you name an asset that meets one of the functions of money, but does not meet the other two? Support your opinion.

If keeping money supply monitored is particularly important, what do we consider as money, then? Is money only what we hold in the form of currency (notes and coins), or also what we hold in our savings accounts?, in checking accounts?, what about investments we may have in certificates of deposit? Are our holdings of stocks (shares traded in the stock markets) also money? What do we consider as money?!