Hello @christian
For coins like $ETH (-0,68%)
$ADA (-0,25%)
$AKT (-0,14%)
$DOT (+0,4%)
$AVAX (+0,17%)
$MATIC (-0,06%) 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.