Hey folks,
i just created a custom component that tracks my invests on crypto. The values need to be set manually in a json file and can be configured in the integration area. Before, i had a 2000 line long yaml file dealing with all that and was now able to replace that with this method.
https://github.com/M-See/crypto_portfolio
The overview looks like that from the integration panel, where you can set general info, add or edit coins - or directly adjust the yaml file.
JSON Editor Window:
The custom lovelace card looks like that and can be configured:
type: custom:crypto-portfolio-card
entity: sensor.crypto_portfolio_value
title: Crypto Portfolio
sort_by: profit
show_graph: true
history_hours: 168
Happy to share that with you guys - since this is my first contribution to this awesome community. Feel free to test - no API key needed - only manual invest info 
!