Make the Bounty tracker a Buff
Every game I think to myself it should have a little bit more detail that just an image by the HP bar alone, a cosmetic buff to provide more detail, tracking the length of the streak and gold to be earned
ex. something like
"Killing Spree:
this champion is on a [X] killing streak! Take them down to earn [X] gold!"
and if they're Legendary;
"Most Wanted:
This Champion is Legendary! Stop their [X] streak for [X] Gold"
maybe even going another step further, a buff tracker for claiming bounties;
"Bounty Hunter
You've ended (3+) killing sprees!"