We do not maintain multiple currencies and we do not wish to do that at this time. What we would like to do is to provide our users with the ability to choose a currency from a picklist dropdown (Chosen Currency) and then to have a field (Calculated Revenue) calculated and displaying the revenue amount in that chosen currency.

It seems like I would be able to do this if I just have a currency table which I can reference which is maintained.

I've been looking into currency apps to maintain a table and they all seem to be based upon the notion that my org would be setup to manage currencies, which we are not.

Are we best off setting up to manage currencies even if we do not intend to have multiple currencies used just to have a currencies table created ?