Currency exchange

We have a question:

Can you sell large amounts of currency with another using a similar rule as on PC 1/80 10/20 and so on ?
I've tried giving larger amounts of currency at the bottom of the currency box but when I add collecting currency it just adds to those places, as well as it can't be used as enhancing by X because each currency is then valued.
Does GGG think of any improvements to trading on consoles or will it stay like this ?