I would recommend charging in your own currency. Especially if you’re going to be using PayPal, as currency exchange requires a fee. Not only that, but exchange rates mean that some will be less for you then others and vice versa.
I used to charge in my currency, it isn’t hard for people to transfer that into their currency and see if it is in their price range, it’s what I do with dollars lol.
(You could even list the price in a variety of currencies on your price list, but be sure to make it clear which you will be accepting)