how do i change the bet amount on Jinxies Jamboree?

If I remember right, the possible bet amount increases once you're a certain way through Umbra Forest. So far you can only bet up to 10 gold at a time because the story only goes a little way into Astryl's Vale. Once the story is able to progress further, we should be able to increase our bid amount again.

Link: https://www.sylestia.com/forums/?thread=27963&page=1#2 Author: Mikazukichan Time Posted: 8/18/2015 at 8:03 PM If I remember right, the possible bet amount increases once you're a certain way through Umbra Forest. So far you can only bet up to 10 gold at a time because the story only goes a little way into Astryl's Vale. Once the story is able to progress further, we should be able to increase our bid amount again.

That is incorrect. It changes to ten at Astryl's Vale, the third zone. The rest of the bets are currently inaccessible at this point in time.

Ah~ Thanks for the correction ^.^ It's been quite a while since I entered Astryl's Vale, so I couldn't remember when it changed XD I just knew it was pretty far in.