Back in the 1980s I got some royalty checks drawn on banks in Scotland and Canada. I couldn't cash them unless I went through a "commercial" bank, which wanted a stiff fee plus a percentage. I contacted the issuing banks, and used the checks to open accounts with them. So for almost twenty years, I had a Canadian dollar account and a British pound account.
The nice thing about the pound accound was that they weren't in the least fazed by odd currencies. Over the years, I dumped all sorts of marks, dollars, pounds, pesetas, etc. in there with no service charges or fees. And, when US savings accounts were lucky to make 1%, I was averaging around 10%.