Not everyone can participate in Fedwire. I believe it also requires that you put your assets one of their accounts if you're going to use it, so you're relying

Not everyone can participate in Fedwire. I believe it also requires that you put your assets one of their accounts if you're going to use it, so you're relying on the credit of the U.S. government (which is pretty good, but still adds risk, and subject to U.S. laws) until you withdraw your funds. And there's probably a lengthy process to deposit and withdraw funds.