Currency Type Column Custom Symbols

Unless anyone has a workaround for this, could the following become a feature?

When choosing a currency symbol from a system-fed select-list, would it be possible to display a value/string form another column ? Even better, have a formula editor there ?

Thanks!

Dear @Laurent_Ades,

Thanks to the suggestion of @Federico.Stefanato, this is a way around:

Thanks @Jean_Pierre_Traets - This is not applicable in our use case: we need to display the symbol in the very field where th user inputs the monetary value.