I’ve heard about a movement about keeping cash alive. However, am I allowed to exchange or keep “foreign” cash in Australia despite it being worth more? For example, I hoard cash via the following currencies: USD, BBD, OMR, KWD, PLN, GBP, EUR & AED to name a few and most are higher value than Australian Dollar.
I mean, will stores (in touristy parts of Sydney) accept the following in cash (mentioned above) directly for transactions. Like for instance: this item costs A$50 but gave them a 200€ (A$330) bill as payment, will they take that at face value due to that being worth more despite it being the second most traded currency globally?


Of course you can keep money in other currencies lol. Of course you won’t be able to spend it in stores that only accept AUD.
Those currencies also aren’t “higher value” than the Aussie dollar. They’re just different currencies, that’s what exchange rates are for.