Hello @christian
For coins like $ETH (+1,06%)
$ADA (+0,57%)
$AKT (+3,77%)
$DOT (+3,05%)
$AVAX (+5,83%)
$MATIC (-0,5%) 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.