volume is an irrelevant metric anyway
having say $50k volume one day but $30k volume the next is MEANINGLESS
it does NOT mean more people are trading.
it does NOT mean more dollar is deposited.
it does NOT mean more people want to buy
volume does not reveal WHO or how much.
for instance with just $5k i can day trade/arbitrage around a market 10 times and make the volume appear as $50k even though the physical $$ moving is just $5k for the entire day.
but i do have to agree, because 'stablecoins' dont have the disadvantage of taking 3-5 business days to move from an american account of exchange A to exchange B. stable coins can be used to arbitrage exchanges in seconds. which makes arbitrages circle faster and thus make volumes numbers appear larger due to more arbitrage cycles.
what would be more of a metric is how much fiat is on orderlines at any one point. then different days you can spot if there are more or less 'buyers' than usual because you can spot how much TOTAL $$ is fixed to an orderline thus able to total how much dollar wants to be buying bitcoin.
the other advantage is that you can spot which direction a market may flow. here is the most easiest way without knowing numbers but just looking at order charts

but getting back to the topic.. the "volume" metric is meaningless.. it reveals absolutely nothing about the markets that can be of any use in any way