The status quo of cross-border, bank-to-bank money movement today is actually somewhat decentralized:

- SWIFT is really just a messaging protocol between a distributed, decentralized set of global banks that are all passing messages/money between each other. Your SWIFT wire might pass through an arbitrary number of correspondent banks, sort of like a flight route with multiple stops, until it reaches its destination.

- Consequently: money moves slowly (up to 5 days), is expensive to move (variable fees assessed either to the payor or payee, by every bank in the chain), and there is an indeterminate amount of manual ops burden, multiplied by every bank in the chain.

- As another commenter points out - services like Wise really just use massive amounts of liquidity spread out globally to try to minimize the number of true, bank-to-bank cross-border settlements required to get low-value payments from A -> B internationally.

Ironically, I think the great accomplishment of stablecoins is its "centralizing" of cross-border money movement into a single ledger -- reducing it to a "book transfer" of sorts -- where getting all the world's money to pass through a single ledger would otherwise be a very difficult (probably intractable) challenge _if it were not for_ the permissionless-ness + global neutrality of the blockchain that is tasked with doing so.

(I wrote about this in a slightly longer post here: https://text-incubation.com/The+great+irony+of+stablecoin)