>>149322832
I get the vibe that the people in the village don't tend to handle a lot of money in general. Asterix probably doesn't have or need a lot of it. Multiple stories show that as clever as he is, he doesn't seem to understand the value of money at all.
Asterix is valuable as a fighter. He's saved their village plenty of times. Maybe the chieftain pays him a salary for his services as a warrior. Or perhaps he grows some kind of crops that he exchanges for other goods with the rest of the villagers. I don't know.