Hello @christian
For coins like $ETH (+0,7%)
$ADA (-1,27%)
$AKT (+9,01%)
$DOT (-2,74%)
$AVAX (-0,18%)
$MATIC (-0,85%) and possible more.
An approximate "%" APR/APY with your monthly or weekly reward would be a very good implementation as these currencies are increasingly more popular + higher marketcap. (BTC and ETH adoption these days)
"Worst" case APR/APY can be configured by the own user.
It would be a feature that separates the application from the rest for the better, pretty clear.
If more feedback is needed I can help ofc.

