So it seems Zimbabwean dollars are now being used as toilet paper

Zimbabwean currency is now so useless it is now being used as tissue paper.

Below is a notice outside a public toilet in Zimbabwe
The First Zimbabwe Dollar (ZWD) is obsolete. In June 2006 it was replaced by the Second Zimbabwe Dollar (ZWN) at a rate of 1000 to 1.

A third and fourth dollar were later introduced and then the currency was abandoned. Zimbabwe now no longer has its own currency and Zimbabwe dollars of all types are worthless.