Add entity values to display Coinbase Portfolio total

I have my Coinbase integration working and I can add the three coins I own and I can convert them to my local currency. That works fine. However, I would rather just see one card with my total Coinbase portfolio current value.

I have found various people trying to sum up energy usage and can’t figure out a way to port that to my scenario.

Running HA Core on an unRaid VM with HACS if that info is needed.

Just found, below is an example.
Not tested myself.