Statistics graph card - adding Bitcoin problem

So I have this sensor created with the rest platform which updates every 300 sec.
I added the device_class, state_class and last_reset attributes using Customisation in the UI.
Looks like

This allowed me to add it to the Statistics Graph card.

type: statistics-graph
  - sensor.bitvavo_rest_bitcoin
days_to_show: 30
  - mean
  - min
  - max
title: Bitcoin
chart_type: line

However the graph doesn’t show and the Y-axis values are way off (BTC = 40000EUR) and it shows 0 - 1.0 in steps of 0.2.
I have waited for 4 hours now to get this populated but doesn’t happen.
Temperatures do show up if I use those sensors.
Anybody an idea?