I agree. My rental monies were paid into my U.K. Santander account. To get that money into the Sabadell Bank in Spain, I have to use a transfer company. I use TransferWise, an Internet exchange company. They make a small charge but I get almost exactly the exact real exchange rate at the time of my transfer. Most months, I transfer £1,000 from Santander to the Sabadell.
All my last 3 transfers have taken just 7 seconds.
I really can't see this crypto currency thing ever properly catching on when even International transfers are that quick and easy.