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
This. And may I also suggest that, for instance, at least the total portfolio value should be displayed in 2 currencies (E.g. ETH and USD) - same way as it's done on CMC, CG etc.
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.