Unfortunately, you can’t, at least not at the moment. There are still no proper Multiversus tournaments that you could bet on. That’s not surprising, really, considering the game is still in a very early phase and will take much longer for its esports scene to start flourishing.
But Multiversus is enjoying a ton of popularity. If things keep being like this, we’re bound to have first big esports events in a matter of months. With them, we’re also bound to have Multiversus betting options too.