Ideas for PvP aspects

If there was the possibility of duels, what if there was a special currency tied to it like with the Cosmo Coins and Badger Coins?

So, whenever you win the fight, you’d get this currency, like Battle Tokens (I don’t know what to call them), which could then be used to buy various items such as exclusive cosmetics/furniture items. In addition to that, maybe the possibility of unique fighting scenarios rather than one specific one (Like Mace combat, Spear combat, etc). Hope this could work out!