You can put a different price for each country (for each inventory), but multi-currency feature currently is not available. We have it in mind but we still don't have an ETA.
In any case, you can bulk edit prices with our premium add-on ATUM Export Pro. With this add-on you will be able to export your data, in this case, products, import it on a spreadsheet, change the prices in bulk, and then import it to your site.
I leave you here the link to the documentation where you will find useful info about how it works: https://forum.stockmanagementlabs.com/t/atum-export-pro-documentation
And the link to the demo site in case you want to try the free trial: https://stockmanagementlabs.com/addons/atum-export-pro/