How recently is “recently”? It seems (to me as an outside observer) that it’s gotten notably harder to get national-currency money out of exchanges in the last, say, 6 months, because (I’m guessing) as the price goes on an upward run, more people who bought low are trying to sell to realize those gains, which triggers higher transaction volume, which suddenly prompts correspondent banks to look at exactly what all this money moving around is — at which point AML/KYC processes kick in and some banks decide the relationship with the exchange is too risky.
Didn’t one of the major crypto exchanges recently lose all its correspondents for awhile and then picked up a single one again?