It's hard to say whether they accept it, even if it eventually becomes more valuable! It reminds me of the currency situation when I lived in Ireland. Despite the fact that the (now-deceased) Irish pound/punt was alway close to par with the British pound sterling, shopkeepers in both countries would rarely take each others' coin. I had a friend who lived in Northern Ireland, and it was a pain to have to exchange money every time I crossed the Ireland/Northern Ireland border.