Wise (previously Transferwise) can do international transfer within seconds. If you're in Europe then payments between any bank in Europe take seconds (SEPA payments).
Wise wouldn't have worked as my friend was among the 10M American adults who are unbanked. Also I doubt him and I would have been able to do account setup on a Sunday, within 1 hour, which is the time it took us to do the transfer, despite this situation being his first time ever using Bitcoin.
I opened my Wise account in 20 minutes. The ID verification is all automated so it's really quick. I haven't heard of anyone who is unbanked before though, what would be a reason for that?