You just have to be in it
Liquidity is atrocious as soon as you leave USD rails and are trying to move more than a few million (in notional usd terms), let alone billions
Downright terrible, its actually amazing how bad it is. “Finance” as infrastructure isn’t anywhere near finished and swapping the currency rails would be very hard
Its more than people just agreeing to use a different currency, which means its more than all traders and merchants dying, the next best currencies have structural problems. Their central banks trying to pump the market full of liquidity would destabilize those currencies far more than it would the USD doing the same thing
But I’m open to being impressed