... you're not actually refuting anything Hal talked about, all you are doing is stating he is wrong, on a specific point that's been pulled out of context from a different argument, without backing up that claim.
... and he's actually not that far off for a rough order-of-magnitude estimate, the total float of all the monetary goods in the world, includes fiat M0-M3, gold/silver acting as money-equivalent, real-estate, bonds and other financial assets that are presently being 'monetised', used as stores-of-value, (since fiat money is being inflated) would be quite close to the total worldwide household wealth ... this is the addressable market for a liquid global reserve money
I already gave my argument. I think it is a non sequitur that the value of money should equal the total amount of wealth in the world. I tried making an analogy with the measuring in thumbs thing (it might not be the most elegant of analogies), see below:
It is not because something is being expressed in a unit, that that unit needs to expand to whatever is being measured. For example, let's say I measure the length of my furniture by comparing to the length of my thumb. Why would there then need to be as many of my thumbs as there is furniture in the world? If that sounds strange or weird, that is because it is weird and nonsensical.
Money is just an asset class on its own, which takes up a certain portion of total wealth in the world.
I don't how else I can or should make my argument.
What is your point? Do you think the value of money should equal the total amount of wealth in the world? Why?
No, it wasn't a horrible estimate. I would guess it is probably off by 1 order of magnitude. Yes I suspect bitcoin will absorb a lot of the value in gold, fiat, bonds, and to a much lesser degree housing and stocks. But I don't see why it would need to be as large as all real-estate, companies, commodities, bonds etc. put together.
I will try to leave it at that. I know I have a tendency to become a bit pedantic and argumentative, and I don't want to hijack the thread.
... your "length of the thumb to measure furniture" argument was quirky, but mostly just a half-baked attempt to come up with a unit-of-account refutation of Hal's point but you maybe onto something here that actually points the way to why Hal was right and it has to do with the competing functions of store-of-value and unit-of-account for a sound money
... a monetary good should perform 3 primary functions; 1) medium-of-exchange, 2) store-of-value and 3) unit-of-account
... now we should expect the global reserve money to perform the best at all 3 functions when fully adopted; bitcoin performs well at 1), okay at 2) but poorly at 3) due to it's transitory volatility while it is being adopted. What would a monetary good have to do to perform well at the 'unit-of-account' function? It would need to be relatively stable in value with respect to all other assets, in fact it would need to be the most stable asset.
... for the monetary good to be the global reserve, i.e. perform unit-of-account function (the denominator function for all wealth),
it would need to have around as much wealth stored in it as in all other forms, or else it would swing around in a volatile manner due to the difference in magnitudes of the relatives sizes of the markets (store-of-value competing effect) ... I believe the italicised text was almost exactly what Hal stated without expanding on the why
Numeraire extraordinaire