Currently the UI only displays the coins earned in the statistics page. As far as I know there's no way to know how much a user has without calculating it themselves. The description of "coins earned all time" implies that's not calculating the coins spent.

This gets problematic if a user repairs their streak multiple times and ultimately uses most of their coins. It's unlikely but it'd be nice to see how many coins the user owns currently.

There could be a split window on the coins page for this like the attached image. Based on the number of forum posts of users asking where they can see their coins this would be a simple way to make the UI more obvious.