We could also just change placeholder: 'EUR/USD/BTC/etc.' to placeholder: 'Amount of donation' so maybe it is less confusing
I think the confusion was more that people couldn't enter the currency because only number are allowed. We could allow also uppercase letters ion the input field for currencies. Or we leave as it is, mostly it just works.
I like what you did with the instruction steps muppeth. Let's add on the '2. start donating' the sentence - to see how to donate go to https:disroot.org/donate
Originally we didn't really care if it is in euros or dollars or any other currency. It is a symbolic donation anyways. I'm not sure why specifying it is important. In my opinion i can be 5USD 5 EUR or 440 Yuan if that covers a symbolic coffee,