What if I'm visiting and my card is not accepted, for example? Just like shops in Canadian border towns which accept US dollars (and vice versa), I imagine the

What if I'm visiting and my card is not accepted, for example? Just like shops in Canadian border towns which accept US dollars (and vice versa), I imagine the shops frequented by visitors will either continue to accept cash -- or, if 20 years from now it's phased out entirely, accept Euros (at a discounted rate, of course).