Possession is 9/10 and if you don't hold it you don't own it. Paper is useful to write on and for cleaning up when using the head
I don't know about the M3 data. There may be solid technical reasons why it's not a good measure of money supply or it's not very meaningful. It may be a wise decision not to publish it; no information is better than distorted or meaningless disinformation. For example, the offical reported US "savings rate" doesn't include pre-tax 401K and IRA contributions, so it's a meaningless number and we might be better off if the government stopped publishing that number and invented a more accurate calculation of savings that includes 401K and IRA contributions.