While there are some downsides, they are impossible to replicate.
Antealls are small metal balls that are used by the Venira - and as an extension Xalnans - as currency.
They are used for most everyday transactions, but it is not uncommon to trade two goods directly. For large transactions the bulk and weight of the Anteall becomes unwieldy. There are some institutions in the larger cities to make such transactions simpler by taking in Antealls and handing out IOU's which can be exchanged for the Antealls again.
These small balls are made out of some kind of metal which is extremely hard and durable. They do not rust and cannot be melted down.
Because of these properties they are believed to be a leftover from the Antediluvian, similar to Conduits.