How did the Aztecs civilization thrived to become so rich?

the Aztecs became as rich as they were because of trade done with other

cities both near and far away because of a rich trade routes travelled by the pochteca or merchants and also because of tribute gathered from conquered cities. the pochteca could become very rich due to the trade and sometime even richer than the nobles themselves. this could cause danger for them and their families so they didnt dare to flaunt it much.