Have a toggle on the dashboard that can switch portfolio view between ETH and another currency for the users choice.
Currently this can be done in Settings and requires a few clicks,
suggestion would add a button on the overview tab on Web, and on the summary tab on Mobile
I like how CoinMarketCap app on Android is doing it. They don't have a toggle button, instead, the user clicks on the price of an asset or the portfolio total value and the currency changes.