International wire money transfer is far too difficult today. And after you've sent it, you still need to wait minutes (hours?) for the receiving end's bank to actually process the wire and move it into the recipient's account (correctly).

Then you need to nag the receiving party to check their account every few minutes so that they can inform you that they actually did receive it successfully. What if they're in a different timezone? 12 hours off?

Moving money on a blockchain is far simpler.