SWIFT is good???
Some of these cryptos allow more TPS than PayPal, they settle in seconds, cost fractions of a penny and have complete visibility. They also come pre-mined so use no more electricity than a dozen idle servers.
Cryptos are not a panacea and blockchain is not the correct solution to every problem, but to even remotely consider that the current international banking system is close to good enough then you're not talking to anyone trading outside Europe.