Trying to get a conditional variable button to show dropdowns depending if the previous dropdown is already visible (dont know if this is possible)

I am trying to setup the conditional variables on a “add” button to show the next Currency option but only if the previous Currency option is visible.

I have done some messing about wiht the variables but I am not even sure if something like this is possible in prototypes right now

I feel a little out of my depth with this one but if someone could help me wrap my head around this it would be amazing