If you’re thinking about diversifying to other currency, another option you have is through E-trade. They now allow you to convert to 5-6 different currencies. On the top of my head, it’s Canadian, Hong Kong, Japan, France, Germany, and I think England. You can then use that currency to buy that nation’s stock. I’m sure if you leave it in there w/out investing it, it’ll earn you interest as well just like regular saving account.