No. If a Seller needs to update their currency after submitting an initial bid, they may contact Marketplace Support at MarketplaceSupport@UnisonGlobal.com to have their bid removed. Once the bid has been removed the Seller can resubmit their bid in the new currency.
If a buyer reposts a buy, you can switch to another currency from the drop-down during the bidding process. Be sure your pricing matches the newly selected currency.